How Skin Color Works

[@theanatomylab]

Check out all the cool stuff! beacons.page/instituteofhumananatomy

[@CommanderBruh]

Ok

[@aussie5493]

Can you please do a specific video in respect to why skin goes "purple/ blue" when we're freezing (cold),. Also perhaps touch on Raynauds. Why when we im said climatic state of being ⁸frozen", our hands in particular fingers, toes, nose and ears are sometimes extreme⁵ly cold as opposed to other areas of our body that remain warm or cool to touch, but not recoil cold, to touch like phalanges. Why when we can be so cold we're numb, yet if ww doe example knock our finger/s, should we knock ourselves while cold ,it actually hurts/stings incredibly, yet we're proportionately numb and why we do feel numb. Also one last thing - what causes our hypothalamus to malfunction? Eg: walking on a cold day, passing other walkers rugged up, then you see that one person with either no shirt on; or a singlet top and sweating. Flush red on exposed body parts.......etc. Thank you 😊 An interesting perspective as opposed to the body dealing with heat and perspiration etc...

[@boorat3573]

🤮🤮🤮🤮

[@jadelynnn]

I know you guys get this a lot but I really want to thank you for giving us a free platform to learn about anatomy and the value of cadavers to help understand how the body works and why organs operate the way they are. the explanations are so well-paced and comprehensible even to those who aren’t med students. I study Human Resources and your videos are really informative and great for study breaks.

[@Raymensoup]

@@markastronskas908 what

[@peachxtaehyung]

Ikr like they could've done this behind a paywall once they got an audience but they decided not to and I thank them for that!!!

[@rilock2435]

Definitely gives the saying "colour is only skin deep" a new perspective.

[@kayc.6984]

Except that this is not remotely true. There are differences in bone structure (especially the skull) between ethnic groups, as well as there are skeletal differences between male and female. A lot can be said from the bones only.

[@rilock2435]

@@kayc.6984 True, I was just more reflecting on the saying and the fact that the color itself is such a thin little layer on the skin. That "skin deep" is less than a paper thickness deep.

[@Harlow_Khmer]

@@kayc.6984 What about the all the other people that claim they aren't male and female.. Is there a difference in their skulls etc 😂

[@Harlow_Khmer]

@@kayc.6984 All jokes aside, you are 100% correct. They can tell the difference between a white man's skull and black man's skull etc

[@anoNEMOs]

Colour is only skin deep, but race isn't

[@ericalashay0209]

I learned about skin pigmentation and layers of the skin when I was in esthetics school and learning about skin when I initially went for my license to do makeup turned into a passion to study skin more. Dermatology is my next step. I love learning about skin. I’m obsessed 😩😩

[@p.o.dgaming9563]

Hey I have bad dandruff. I was wondering if you had any tips on getting rid of it?

[@Heyzues21]

Teach me stuff

[@monicajane7888]

@@p.o.dgaming9563 go to dr. Pimple popper she has a great video on dandruff.

[@mcmerry2846]

Do you like skin cuddles?

[@p.o.dgaming9563]

@@monicajane7888 lol you got mad weirdos in your comments😂

[@balarion539]

Remember, everyone needs sunscreen, not just pale/white people. Your melanin is back up protection. Love your skin and treat it well

[@oldcowbb]

i don't, because i never go out

[@thomash4047]

damn ive cut through all layers of my skin twice lol

[@Adriana.Gabriela]

Not everyone. Everyone needs to be exposed to the sun smartly, and only some people need sunacreen. It takes a lot for me to get a sunburn, and I'm used to spending all days in the sun (I even used to work in the sun all day), but I would start spending more time in the sun in early or mid spring, starting small (an hour) and when the sun is lower, and then increasing gradually to more time and higher sun. Which is basically how you would get exposed in nature. Even without that it takes a lot for me to sunburn, but this is my extra measure because like that, I can take even more sun that I would usually. Well, *the only time I used sunscreen (only on my neck and shoulder) was also the only time I got sunburnt so easily, and so much, AND only in the places covered by sunscreen (neck and shoulders). Never again* Note that I'm not saying that sunscreen makes people burn more easily, but it obviously does *some* people. Point is, sunscreen is not for everybody. Plus, most brands are also not healthy and are destroying coral reefs Start getting expowed to the sun smartly/naturally, and not abruptly as most people do. And use sunscreen only if you really need it. Preferrably one of those few good kinds

[@gibbyjones1040]

sunscreen is totally bad for your skin

[@balarion539]

@@gibbyjones1040 no it isn't. Not wearing it increases your chances of skin cancer, sunburn (which weakens the immune system), causes premature aging, and causes hyperpigmentation. Sunscreen is VITAL to healthy skin.

[@Iamdfieldstv]

I'm an esthetician and I have to say that this video is AMAZING!!!!! I wish my esthetic instructors would have given examples like the ones you used, it would have made the learning experience much easier and enjoyable! You were very detailed in this video and you made it easy to understand.

[@akimichaeljackson3343]

I love to listen whatever you say. Amazing explaining every topic.

[@theanatomylab]

Wow, thank you!

[@arianebennion]

I agree!

[@nancyterrazas12]

I would really like to know about pimples, different kinds different sizes and why some seem to have a never ending dream of white goop spraying out.

[@janiceperez9538]

😂😂😂

[@tifalockart7298]

omgg me too

[@prapanthebachelorette6803]

Me too, also about melasma

[@nightsfalling]

They already did kzbin.info/www/bejne/a3KcpoeMitOXfLc

[@Versuffe]

It’s usually oils and hairs.

[@desifromitaly2205]

I really would like to see a video about stretch marks.

[@parvathy8681]

Yay Jonathan! If he was my professor I would breeze through each class

[@themoldychedderyt]

Indeed! He explains everything very well and it doesn't bore me

[@jeniferlopes3899]

Jonathan is my crush

[@arianebennion]

@@jeniferlopes3899 mine too!

[@arianebennion]

😁

[@nogidoki3325]

And then become his cadaver when you die 😂😂😂

[@vickiegray690]

After watching this presentation on skin pigment could you tell us what’s going on in a person with vitiligo? I’ve always wanted to understand why it happens and what’s going on that causes the non-pigmented layer.

[@Pebbz30530]

Yes. My son has vitiligo not even his dermatologist can explain it properly. She just says lack of melatonin 😴

[@zamim.aka-arima_z4753]

@@Pebbz30530 you mean MELANIN. Melatonin is a hormone related to sleep😴 . I think vitiligo is when you stop producing melanin or your own body destroys it slowly. I’m not sure tho.

[@BethCampbell-b9c]

Good question! I’ve had vitiligo since my very early 20’s and now, over 30 years later, i have no melanin in my skin. I know it is a genetic issue, and that’s about it.

[@DrDmitrii]

Most of our cells have a nucleus. Nucleus has genes. Every cell with nucleus has the same genes. Genes need for produsing proteins. We can say that melanin is a protein that is very important. It protects from "sun". Albino people and some kind of vitiligo have mutation in the gene that "produces" melanin. So the melanin as a protein can't be used by cells right or it doesn't work or produced at all. These people need protection from sun permanently cause they can get skin cancer much easier. Melanin is used in our eyes as well, so people without this pegment see very bad. There are other reasons why people don't have pegments, but it is the most common and other are extremely rare. Sorry for my bad english

[@BB-uv8gm]

It has something to do with the immune system attacking the cells that create pigment. Reading off of Wikipedia, it doesn't have an exact cause, but you're more likely to have it if it's in your family. When you have an autoimmune disease and/or experience a trigger that sets it off (like stress, a severe sunburn, or skin trauma) your body responds by attacking melanin producing cells (melanocytes). So as those cells die or stop working, you get patches of skin that don't have any melanin in them.

[@graciesinclair305]

Okay so, can you do a video on psoriasis and eczema and other skin allergies? I love all these videos!

[@x29742x]

YES PLEASE! 👏👏

[@AnjaliPathak5]

I want to thank the entire team for putting together all these videos for us to learn about the human body, and appreciate and take care of this gift of life. Your explanation is very simple and easy to follow. Could you also please do a video on sciatica or nerves in the lower body that can cause pain while exercising? That would be really helpful for many of us.

[@tammy707]

It’s amazing how the skin color of palms and feet are the same color, no matter the color of your overall skin and the reason why. I wondered that 😊

[@evelynharber6077]

Before I get too deep into this video I wish to say THANK YOU to Jonathon as you always include sub-text on/in your videos. That helps those who suffer from a hearing deficient to also be informed as to what is being said. Again THANK YOU!!!!! (Would also do hearts if I knew how!)

[@andyvillasenor5110]

So why don’t freckles “grow out” like how the cells with extra melanin from UV exposure do? Is it just because the melanocytes in that area are just constantly producing that level of melanin (above the baseline level of the surrounding skin)?

[@carolisakallas3054]

Sadly, I hated my cute face freckles as a pre-teen and beyond. But now at 59 I realize they were a sweet sign of youth. I wish I had known it then. They're gone now. No, they don't grow out. They fade. Mine were the worst after sun exposure. They faded (shed) enough to where I could cover them with a light foundation. They're just little collections of melanin, I guess.

[@fennecishere]

Yeah freckles are just areas that produce more melanin. If I dont go out in the sun for a while, my freckles become lighter and I have fewer, but when I've been out in the sun a lot my freckles are much darker and theres a lot more. Its also why areas normally covered by clothes don't have many freckles. So its basically clumps of skin who's baseline of melanin is higher than the surrounding skin. I think as you get older the baseline can rise in clumps, since no one is born with freckles. Of course I'm just someone who has observed my own freckles, so I may be wrong

[@ce4072]

Freckles fade over time without sun exposure. I spent three years trying to stay as covered from the sun as possible and most of them on my arms had faded; then in one afternoon on the beach I got all of them back plus some new ones. Acne face washes and creams also lighten the skin with use and I lost most of the freckles on my face from that.

[@jowalden-evans2951]

@@carolisakallas3054 I have had freckles all my life, heading into my 60's. I cover up and areas that don't get any sun now, still have freckles😣.

[@lilitheden748]

The other day I was watching kindergarten children playing outside. They don’t seem to even notice the difference in skin colour of their friends. It’s growing up that makes people fucked up. I remember my daughter (she must have been 4 or 5 ) asking a black friend of mine why his skin was different. His answer was “I’m born this way”. That was sufficient for her, she said “ah, ok then” and went skipping away 😄. For her seventh birthday I got her a Baby Born doll (that was then the preferred kind of doll). Instead of a white one I bought a dark skinned one. She was pleased with it. She took that doll with her everywhere we went. It’s all about education and learning your kids that skin colour is just that. What counts is a persons character. Still it seems that discrimination because of (darker) skin colour is global. I remember an Indian friend telling me that in India women bleach their skin because people with a lighter skin are more highly regarded then darker coloured ones . With a lighter skin they find a better husband, get a better job and so on.. This is discrimination between the own population. Sadly this happens in lots of countries where people have a darker skin.

[@TheAutumnWind_RN4L]

You are a very good mom. Eurocentric beauty standards are possibly widespread due to western colonization, but there are other cultural factors that I did not understand myself until I talked to some people in the Eastern world. Some Asian cultures, particularly Japanese and Chinese have whitened there skin for ages, even before any knowledge of Europeans. Throughout literature, religion, and culture, the color white has been attributed to the characteristics of prosperity, wealth, purity, and godliness. Before skin lighteners, they used stark white paints for makeup, particularly women of a higher class and social status, whereas the commoners sported tans and darker skin due to a mostly agricultural working class. Lack of or the presence of brown skin in these cultures signified where one was situated in their caste systems. This also happened in places such as India and Mexico, and the cycle is perpetuated by the influences of Western media. One of the most interesting things that I've ever seen was a documentary on Japanese animation. You see, as an American, I had always wondered why Japanese animators and manga artists drew themselves with European features. My mind was blown when an artist explained that this is not the case at all. The issue was not how they expressed themselves visually, but how my American mind and cultural views tainted their visual expression and representation of themselves. As an American, I am taught that the default white human is of European origin. The manga artist, inspired by Disney animation, makes the concession that the eyes are large because they are used to show expression, but their default white human is Japanese. Blew my mind! I immediately recognized that some things that people do as a culture, can be completely misconstrued, and at the same time I wondered how many other prejudices I might be harboring due to the "lost in translation" factor that naturally exists between people of different cultures. Lilith, two individuals that work together for 20 years, spend more time together than they do with their own intimate associates and family, might not ever be able to understand each other on a fundamental level because some things are lost in translation; they are difficult to quantify and communicate on a basic human level. The human psyche is so complex, and we have lost so much because of bickering over completely superficial physical and geographical proximity differences. What you did with your child was a huge step towards remedying this loss. I commend you for it.

[@mcmerry2846]

They do notice the difference...but they don't care...as it should be

[@neosav7476]

I would say the opposite. Tribalism and in group preferences are both part of human nature. Children are not born as racial egalitarians, that is something which must be taught. Children need to be taught to NOT be tribal, to ignore racial differences. It isn’t something which comes naturally to human beings, as history has shown.

[@MrDALE-jy8tu]

Sammy Sosa has joined the conversation...

[@ChibiTheEdgehog]

Parenting is about 90% of the bias

[@openmystic163]

One top layer people overlook is the lipid film that naturally forms on your skin if you don't wash it. My doctor calls it my "protective layer". It handily darkens the skin appearance so I don't look lily white for one thing. Dirt that gets on your skin sticks to the lipid layer and not the epidermis. When I started doing this, I lost my poison oak allergy, and my skin is never irritable, which I tested by wearing the same t-shirt day after day. The microbiota, which are not destroyed by soap in my case, seem to manage the skin flora so there are no odors such as from bacteria. This layer appears to have some UV blocking protection as well. If you scrape off the layer with a coarse washrag and soap, the skin underneath looks like that of child. Etc., etc.. It works like magic. One of the best ideas I've ever had.

[@gabe7130]

Perfect timing. I have an exam Tuesday covering this exact subject

[@zdtgamingforce]

Good luck :) hope you get an a+ god bless

[@kevinduran9337]

Once again i am astounded by the amount of information you're able to communicate to us in such z short video. Thank you sir! Great presentation!

[@AshishMassey]

This is one of the best channel on KZbin.

[@winterfellwhall9934]

Here in Colombia there are TONS of different skin colors, and this guy just thought me were all the same; amazing.

[@bbbxoxobbb]

I love this stuff. I took a cadaver class and it was the most fascinating thing ever. The body is extremely spectacular and detailed. I'm so glad I found this channel.

[@nikkimurphy6893]

I am a person with freckles and while I am still growing to love them, I am also still trying to lighten them, responsibly. And most of all respectively because I love them on other people, I just do not like them on myself. Any suggestions or is it even possible? We are all beautiful in our own way and must always take care of our bodies! Thank you for these videos, I LOVE these videos and you guys are amazing!!

[@ayshiaarmani]

So helpful! Can you create an extra vid on what’s happening in the skin when sun spots are formed and why they dont get shed/return to normal like a normal tan/exposure to the sun. Also an explanation on how the melanocytes work in areas that have natural freckles, so why the surrounding skin is lighter but the areas with freckles stay darker and dont change.

[@aspasiamaggina453]

Με το υπέροχο σας κανάλι με βοηθάτε πολύ να μάθω φανταστικά πράγματα για το σώμα μας. Σας ευχαριστώ πολύ περιμένω με ανυπομονησία το επόμενο βίντεο.

[@pmbluemoon]

This was awesome! As you were talking about skin color, freckles and such, how about non cancerous moles? Have you done a video on those (maybe even different kinds of moles and birth marks? (I have one that is extremely large and my dermatologist loves to keep an eye on it! It also grows darker thicker hair than the rest of my skin) Thank you so much for making these videos, I'm fascinated by this channel, and I thank all of you for teaming up to bring educational videos to us (and me of course! 😁👍)

[@wonder_platypus8337]

Might be morbid but this guy has an awesome job. The Human body is freaking awesome.

[@fggddtu2668]

oh yea def an awesome job, especially if you’re as interested in the body as much as John!😂

[@gaylebynumcardosa7034]

As an aside, that flattening of the cells as they reach the surface slows down as we age which gives our skin that appearance of duller looking skin which is why a gentle exfoliation can aid in younger looking skin. Lightly scrubbing (lightly!) the skin helps slough off those dead, flat skin cells of the stratum granulosum and aids in the cell turnover.

[@smoupnhoize]

This is my new favorite channel. I wish I had the chance to go to a cadaver lab in nursing school. Your channel is FASCINATING!!!

[@GamerDave1974]

Agreed! TOO many people judge a person by their skin color or their background. And I appreciate the ones who don't, me being one of them.

[@debrastough5407]

Hey, I hope that you guys would consider doing a show on ulcerative colitis. I enjoy watching you guys, and I want to thank these people that donate their bodies to help others learn! Thanks for all the work y’all do !

[@jjbode1]

I'd like to see an explanation of what easily bruised skin signifies. Your videos are good, they make me think I should have learnt a medical trade.

[@pov.e7588]

This video is gonna transcend generations 💪🏾

[@sarahcircus4972]

You explained how getting a tan works very well. I'd like to know about sunburns too. Like what's going on with the cells when someone gets a sunburn

[@Dr3Mc3Ninja]

A video on teeth and gums would be pretty neat.

[@mylene6520]

Found your channel because of your tattoo video (was looking for tattoo videos for horses ). From then on, I’m hooked. Thanks Jonathan! 😊

[@theanatomylab]

Glad you like them!

[@amberrodriguez851]

This is sooooo interesting! Thank you! I learned a lot about this in cosmetology school (surprise surprise), but you going into details like this… amazing. Thanks again!

[@SuperMissblueeyes]

Thank you for the revision. I'm studying for a health science degree & this has been the topic for the last two weeks. But you didn't mention the two different types of melanin. Eumelanin is produced in larger quantities in people with darker skin, while pheomelanin is produced in larger quantities in people with lighter skin. People with fair skin may not produce any eumelanin at all. Info courtesy of The Open University, based in Milton Keynes in the UK. The Open University is a distance learning university & takes international students as well as UK students. But again, thanks for the revision, it will definitely help me remember what I've learned & I can come back to this video for revision again next summer before my exam.

[@plpno]

Can you do a follow up video regarding how moles appear on the skin? Why some are flat and some are raised? Are they cancerous?

[@richardpounall2993]

This proves that we are all equal underneath

[@arianebennion]

Inside and out!

[@murrayshekelberg9754]

nature doesn't make equal. we are different and race is much more than skin color. 'better' or 'worse' is a matter of opinion. You are making a marxist philosophical statement, not a statement based on reality.

[@junkoenoshima2756]

@@murrayshekelberg9754 racism is a social phenomenon its not natural

[@shanaadams4456]

@@murrayshekelberg9754 you missed the plot. The message flew over your head.

[@murrayshekelberg9754]

@@shanaadams4456 ironic thing for you to say

[@queenseabee8113]

Speaking of skin, can you make a video on calluses? Moles, warts, skin tags and other such things on the skin?

[@LifesMagicalJourney]

Another great video! Jonathan for the win! 💯

[@arianebennion]

I agree with you! 💯

[@TheMilkMan8008]

This is also an interesting part of our evolutionary biology, not just anatomy.

[@robertsworld5337]

I am so sorry I had such a dirty mind about this picture😭

[@idkimjustdarkfudgelol6896]

That pfp set me up

[@nicoledobra]

@@robertsworld5337 me too lol

[@haze6647]

@@robertsworld5337 bruh, i think we need to bleach our brain.

[@robertsworld5337]

@@haze6647 😂

[@briannag2205]

My 2yr old has epidermal nevus. Birthmark. Very thick in some areas and very large from chest to ankle on one side of body.

[@anthonylezama1645]

I have a question. So since the oils released in the Stratum Granulosum act as a barrier around the skin, excluding the palms of our hands and soles of our feet, is that why our palms and soles are more susceptible to pruning when in water for long periods of time?

[@anthonylezama1645]

I've seen people stay in water for extreme periods of time, and even the rest of the skin eventually prunes. I assume it's because the water continuously washes away the oils that the skin just shrivels, idk lol

[@tanja9878]

this is really interesting to watch as a cosmetology student, cause we are just now learning about skin

[@mckee720]

As an esthetician, I approve (and respect!) this message ❤️

[@braydenwong7350]

Is there particular reasons why our lips display with different pigment and texture as well?

[@tifalockart7298]

this !! im very curious too!! some people have plump juicy and pink lips while other kinda have dark and chapped lips. mine are dry and chapped eventhough i drink enough water.

[@paigeconnelly4244]

It's because the skin type is different. It's made of mucosa which has a different structure to normal skin. It's the same type of skin as what is in your mouth and genital area. Also, the skin on the lips are thinner to aid with sensitivity, whcih is why they appear red or pink on people with lighter skin tones - you're literally seeing the colour of the blood vessels underneath.

[@braydenwong7350]

@@paigeconnelly4244 very cool, thank you

[@mememan1546]

The skin in and around your mouth, nipples, and genitals is thinner than the rest of your body, so you're literally seeing the blood underneath the skin in those areas.

[@alderoak2792]

@@paigeconnelly4244 Thanks! I had no idea :)

[@marshalepine248]

I have eczema only on the back of my hands thanks for explaining why its not on the front. ( much thicker skin). Subhaan Allah

[@susmitadey4663]

Sir,this is very helpful for my zoology honours studies....and you explain every concepts very clearly ...sir please càn you make a vedio on how we gote pimples

[@purpleclove1929]

I hope IOHA reads these questions! Vid has been up for less than an hour and there are some great questions here, enough to make another video!!

[@Wedcreature]

Technically we don’t even need to take all the skin off to not tell the difference between cadavers. Just take the epidermis off and they’re indistinguishable. Kinda crazy.

[@neesan9962]

Wouldn’t the facial features stay the same?

[@Wedcreature]

Jonathan was going off of skin pigmentation. Not facial features

[@Wedcreature]

Well then why did he make the comment “if we remove all the skin off you wouldn’t be able to tell between different skin toned people? I don’t think skin color has anything to do with drastic skull structure. Everyone’s unique.

[@Wedcreature]

But people who are not taught those(majority of people) cannot tell the difference.

[@Wedcreature]

And i do get that there are structures that may determine a skin tone. But removing the skin it would be extremely hard to actually tell who had which skin tone. Because there are still muscles and all of that attatched. So sure stripping a body of all muscle and skin you could probably identify what skin tone an individual has. But with it on and no bone showing probably gonna be real hard to, and maybe near impossible. Since every person is unique

[@dianamedrano5733]

Speaking of skin, would you be able to explain psoriasis and what happens to the skin cells and layers? I have psoriasis and I have delt with it since I was a kid but I would like to better understand it.

[@cococ.1650]

Informative as always. Thanks for sharing 👍

[@NeverQuiteAlex]

People literally hate each other because of .15mm, and it's ridiculous.

[@Scrap5000]

Which people hate which people more now a days?

[@mongkuier4465]

@@Scrap5000 oh brother🤦🏿‍♂️

[@tevaiteacerco969]

@@Scrap5000 Open a junior high-school textbook and you'll find out.

[@marshalepine248]

Its actually the epidermis colour that some people hate each other over and its only 0.15mm. BTW love you all just the way you were meant to be.

[@summer6100]

but when someone has that hate they'll never see it like that. they will come up with a reason that makes it make sense. so pointing this out will seem ridiculous and upsetting and they'll cling to their chosen worldview.

[@JessMakeSense]

Do a video on the Circle of Willis or Circulus Arteriosus Cerebri please!

[@DustyGus]

You should do a video on the lumbar complex/sacrum/pelvis and how the nerves run through it. I fell out of a tree recently and I'm now feeling how important and complicated that area is.

[@dizibangman3302]

Thanks for your time.

[@dev6591]

your channel is absolutely incredible. thank you!!

[@christymurphy373]

This makes me miss being an esthetician ❤ skin is so amazing

[@gregbrooks7233]

Very well explained and interesting video! Thank you. I too avoid too much sun as a light-skinned person. I love a sunny breezy day.... in the shade..... I would like to see videos on how our bodies experience smells and tastes.

[@elvisejovi6115]

Love this very educational thank you

[@sacphilip]

How long does it take for tanned skin to be replaced with the regular genetic color of skin? Will over exposure to UV rays make tanning of skin irreversible?

[@Adriana.Gabriela]

I wish 😂 instead people loose their tanning ability with age

[@cbrown8615]

Used them for a few years. Like a suntan, it fads at the same time.

[@mathewvanostin7118]

Living in canada. By december everyone gets back to his natural colour 😂 i would say 2 month with insufficient uv stimulation is enough to make someone that is very tanned lose 100% of it

[@mememan1546]

Could you also do a video on callouses? Knowing that the epidermis is only millimeters thick, I want to know what a callous is actually made of and how much is epidermal tissue.

[@aasemahsan]

Keratinocyte Melanocyte Stratum Basaly Stratum Spinosum Stratum Granulosum Stratum Lucidum (Found only in palm of the hand & sole of the feet) Stratum Corneum Ephiledis (inherited freckles) Lentigenis (sunburn freckles)

[@avycatte]

I thought the thumbnail was the back of a pancake and now I'm terrified.

[@MrBgwolf]

When I was in the Army, I had have the skin on one arm burnt off. It looked horrible. I had this one burn doctor that that had a nurse put silverdean on it. I would like to under stand why it did such a good job the scar is hardly noticeable.

[@kateclark7250]

Interesting lesson! Thanks Jonathan.

[@aider.1741]

Sir can you please make a detailed video on mole .Why it's on our body?

[@josephinetyree1476]

I was happy to know I had retained so many 'name's' of the layers of skin...as well as when you go over skeletal parts....from my interest in biology/forensics...THANKS so much for these Vid's...OH I thought you said you were going to say something about tattoos in the end ???

[@GirladyLocks]

These videos are so very interesting! Thank you!

[@danishakhtar1643]

Please make a detailed video on spinal cord and different types of compression causes due to accidents and effects of the broken Spinal cord. I means everything about spinal cord and vertebrae. Please sir make a video in this topic. Please. All your videos are wonderful ❤️❤️❤️

[@mspw]

Thanks for another excellent anatomy lesson, Jonathan! Can you do a video on the anatomy of dimples, and what happens to them throughout aging?

[@dgeormadu9309]

Thanks for the simple explanation. The skin is an amazing Organ.

[@SachitraJayasiri]

Very well explained and interesting video. My humble Respect.

[@sakura0273]

this you tube channel is awesome 😘 🥰 kudos 😉 all your videos are informative...

[@thatlegendarytrainer]

Thanks for the video!

[@theanatomylab]

You bet!

[@BananLord]

On the subject of skin, please explain moles

[@greylethallin7819]

I love this channel love this sorta info

[@jeniferlopes3899]

I was waiting for this

[@MedEighty]

I have so many questions. Is it that sun exposure alters the normal processes of existing melanocytes and causes them to get stuck in producing a higher baseline level of melanin, resulting in lentigines, or is it that sun exposure causes new melanocytes that are being formed to be programmed to produce higher baseline levels of melanin until they die off, or is it a combination of the two? As no cell lives forever, do lentigines move around the skin, as time goes by? How about ephelides or lentigo senilis? Do they move around?

[@itsjustchloethatsit]

Could you maybe cover the effects of strokes or CVSTs specifically on the brain and body?

[@1brickrow]

Would love to see one on eye colors.

[@Vivaswaan.]

One of the most interesting topics covered... and all my curious questions answered. Wow!!

[@ajaykumarjha1608]

Excellent and very useful description

[@sydney5266]

What about things like birthmarks… they arent passed down or caused by sun damage yet mine still tans with me and most times it stays darker for longer than my normal skin

[@danielmsignorini]

It’d be cool if you folks could cover something like scars or callouses or skin tags. It would be interesting!

[@KP-vw2lu]

can you do a video what body lotion does to your skin? would be awesome to see. i don't know whether i should apply any kind of body lotion or what. thanks

[@paulniagwan2095]

Very educative channel. Bravo

[@osakasweetie19]

My skin pigmentation went haywire and now I have many cheetah spots (hyperpigmentation) 😭

[@minecraftstation6422]

You're stunning even as a cheetah 👌

[@arkylicious]

Same here😭 Hated it at first but learned to love it

[@minecraftstation6422]

@@arkylicious it's kinda cool ngl

[@purpleclove1929]

@osakasweetie19 Rock those spots!!! Strut like a cheetah!! They are beautiful, powerful, elegant creatures!!! You are too!!!

[@osakasweetie19]

Thanks guys! You’re all the best ❤️❤️

[@KittySkeed]

The dead bodies behind this guy is a total mood

[@mahentahen5992]

How so kitty skeed?

[@tabithaedwards1205]

The cops are on their way ma'am/sir or whatever

[@alasdairmarshall5676]

Could you explain pigment in hair and why/how we go grey.

[@erikziak1249]

Even better than any sunscreen: Keep in the shadow, wear a hat and clothes. Protect yourself from the sun by keeping in the shadows. Works for me.

[@gaylebynumcardosa7034]

Another thing I'd be interested in seeing some day...my father died of esophageal cancer. The tumor pushed from the esophagus into the surrounding areas. I would really be interested in seeing what cancers look like and how they take over the body.

[@susanlime8012]

I have a question ,what happens when you have vitiligo what happens to your skin actually

[@melissacurran530]

In vitiligo, the person's body attacks and destroys the melanocytes, the pigment-producing cells.

[@jamodrummer]

Another very informative video. Thank you!

[@debasisdutt]

Can you put some light on why the skin tag grows ? Thanks for this video 👍🌹

[@Jeannie70]

Could you explain razor burn? . Why do we get it sometimes and some places but not always?

[@LauraC-hq7sm]

This professor Johnathan is gorgeous