The Integumentary System

[@prasanth1142]

**Skin Structure:** - Made up of epidermis (outer layer) and dermis (inner layer). - Epidermis is avascular and made of keratinized stratified squamous epithelium. - Dermis is vascularized connective tissue. - Below dermis is subcutaneous layer (hypodermis) made of adipose tissue. **Epidermis Layers:** 1. Stratum basale: Single row of rapidly dividing keratinocytes, contains melanocytes and tactile cells. 2. Stratum spinosum: Several layers of spiky cells connected by desmosomes, contains dendritic cells. 3. Stratum granulosum: 4-6 cell layers, beginning of keratinization. 4. Stratum lucidum: 2-3 cell layers of clear, dead keratinocytes. 5. Stratum corneum: 20-30 cell layers of dead, anucleated keratinocytes. **Dermis:** - Strong, flexible connective tissue. - Papillary layer: Thin, areolar connective tissue with dermal papillae. - Reticular layer: Dense fibrous connective tissue with blood vessels. **Skin Pigmentation:** - Melanocytes produce melanin, determining skin color and protecting from UV radiation. - Other pigments include carotene (yellow-orange) and hemoglobin (red when oxygenated). **Skin Appendages:** 1. Hair: Made of dead, keratinized cells, produced by hair follicles. 2. Nails: Modified epidermis made of hard keratin. 3. Glands: Sweat glands (eccrine and apocrine), sebaceous glands (oil glands).

[@MuhammmadRiqqahIstihsan]

thank you for the simplication sir

[@kait3204]

Ily

[@FerghusCameron]

Much appreciated.

[@yaseminnursahin1710]

1) Collagen and elastic fibers are seen in the papillary layer of dermis. 2) Reticular tissue is made of irregular dense connective tissue. 3) Melanocytes are seen in the stratum basale of epidermis. 4) Eccrine/Merocrine sweat glands release their watery secretion directly to the epidermis. 5) Apocrine sweat glands release their secretion through the hair follicles on certain areas(armpits and outer genital areas) and cause body odor.

[@dawoodalmas2476]

Thank you

[@matheusnyirenda8486]

Bros 14 minutes teachings make more sense than my lecturers of 4hrs 😂😂🙌

[@pwincezzetz]

One day, I'm going to be at this level of excellence. Thank you Professor Dave, you inspire me to be great.

[@JGscienceGaming]

Same!

[@ivoryas1696]

@@JGscienceGaming Same _and_ same.

[@briannauquillas]

This is the best explanation out of all the other youtube videos. Thank you so much, I really appreciate it!!!!!!

[@jordanmontague2863]

taught me more than my own professor who ive paid to teach me....

[@blessedsuccessful]

😂😂😂😂😂😂

[@fredquack7749]

You speak the truth this guy is a God send.

[@elenasultan3627]

I also paid for the course but learning from KZbin 🤣

[@fleafly1359]

I agree!! My teacher mostly reads from a book!!

[@TreeofLife_111]

Pretty much the same for me …

[@Tutorial4healthstudents]

I need to go through your profile and biography. You inspire me a lot. I'm even confused on your area of interest. You're always the best in everything.

[@insertnamehere-c1n]

This video will come in clutch for my anatomy and physiology exam :D

[@laurenceurio4798]

Thank's a lot sir GOD bless you

[@JordanMcLeod-jl5rh]

found this with 2 days to go before an exam! Amazing, my profs lectures make no sense but this visual image of it is amazing!

[@Samwise_92]

You're probably a visual learner! I am too and I can't make sense of these things unless I see a video of them or photos.

[@waynetteturner2040]

So thankful for your channel. Now to watch this video over and over till my brain remembers it! 🤣

[@Tutorial4healthstudents]

Always get topnotch lecturers from your teachings. Excellent!

[@rizabalwenardgabrille7429]

Thank you for your videos. They're great and gives me an overview ahead the topic, organized, and simple

[@lismarydejesus31]

Thank you 🙏🏼 aesthetician student here 🙋🏻‍♀️

[@ari220884]

Your videos are the best!! You go straight to the point!

[@khairunisha1390]

hi, im from malaysia. im bad in english. but when i found your vid, i really undrstood it compared with the other video. tq so muchh!!!

[@beautyqueen2979]

You explain my 100 plus pages in less than an hour God bless you ❤️

[@acceptableinformation]

WELL EXPLAINED. THANKS

[@kaylajayme6091]

Thank you for sharing your knowledge about these things, Professor. I could say you're my best virtual science teacher. THANK YOU SO MUCH!

[@bdoor8720]

Thank you so much professor dave 💜💜💜🫶🏻

[@gusniarniindhi]

thats was an amazing channel i ever watch

[@evelynappiahyeboaa7894]

thumb up for the good works Professor Dave

[@deepfaithbelieverschurchli8033]

Your explanation is clear and helpful to me as am pursuing my degree

[@missMagbeth]

Great animation and explanation! Love your series!

[@therealregisterednurse6865]

I'm just a nursing student trying to start the semeser off right !!!!!

[@harrisonantwi6869]

My most inspired Professor ❤❤

[@Bilbus7]

Bangin' playlist, stud!

[@CeciliaMuench]

Extraordinary! thank you for your generosity of sharing so much knowledge!

[@mustbeadilene]

Very great detailed video

[@bmkkhonde8279]

what an easy explanation woooooow I become a fan... Thank you so much

[@appattuvilaisamivilai3065]

Really helpful professor Dave . Please keep doing this

[@oof3599]

Thank you biology jesus, you have taught me well.

[@faridamel]

Thank you so much you really saved me today God bless you

[@aprilpatriot8823]

I have a bad infection. I've been to many dermatologist. They don't help me. I'm looking to fig it out myself. Thanks a bunch.

[@santibrighton7508]

So helpful Teaches better than my professor

[@essnjora9904]

Thank you, Prof! 💖💖

[@mariarosarioespiritu7926]

The video is very helpful in my teaching. Can I have a copy of the offline video? Thank you very much.

[@Titimuhammad]

Cosmetology Student, Thank you👩‍🎓💙

[@aurangzebkhan9497]

Congrats on advance fr 1 M subscribers love from Pakistan

[@accountback7473]

4:19 what layer

[@Bitter_Spice]

Had to double check and yeah,it’s what you heard

[@nataliaquinterodiaz4211]

Excelente explicación ...muchas gracias

[@aminabukhari2533]

Thank you professor Dave 😊

[@shellymasunga8375]

You really make everything seem too simple. thank you very much

[@rochelroma180]

thank you professor dave

[@snehabhosale3763]

Thank you sir for making excellent video on this chapter.....

[@تقيالجراح]

Thank you very much, there are a lot of new information I got from your kind lecture.

[@leyvethventura9480]

We'll be having a reporting tomorrow and this surely helps a lot .thanks!

[@rafiqsuleman8490]

Very excellent explanation about skin. Marvelous.

[@laibakhalid7509]

Best video 👍👍👍. Thank you so much 😍

[@sylvaneeclayton6722]

Thanks Professor Dave!!

[@riyajose5771]

Nice presentation sir 👍💜

[@Ditto_9803]

Great teacher in youtube......

[@forbimildredneh1040]

Thank you professor Dave

[@Alan-megan]

VERY GOOD VIDEO BRO 👏👏👏👏👍👍

[@ms.vision1656]

thanks a lot bro

[@ximenasanchez6036]

Thankssss, this was really helpful!

[@nehefatou4230]

One word, "Brilliant"!

[@Rachel-zf3sq]

Thank you so much for the video!!

[@hudab7647]

Wow this video is amazing ♥️♥️♥️

[@sujatasahoo1128]

Thank u sir ...for this good explanation and notes👍

[@relambuyi]

Thanks ❤❤❤ I appreciate it🎉🎉🎉

[@AnishaKotakonda17]

Got a 100 on my epi dermis quiz thank you!!!!

[@mariaeggleston5175]

Your explanations are perfect! Thank You

[@Studypharmaa]

Informative video👍

[@augustinekyem8422]

oh prof, you are actually awesome.

[@deqaibrahim7612]

Thanks for the video it's really helpfull

[@sajjadkhan227]

Thanks Dave!

[@Pain-yx1ri]

Thank you for this!

[@willamaestuart4421]

thank you for simplifying science

[@rynophobia331]

Well Explained. Thanks

[@jessicamanson374]

This showed up on my KZbin homepage as I’m learning about the integumentary system in my Anatomy & Physiology class….😳

[@Zetsuke4]

Incredible!

[@blesssperiodico1743]

Hi! Why the other video are private? I always follow your lesson. you are the best and very helpful :D :(

[@ProfessorDaveExplains]

i release one per week, don't worry you'll get them all!

[@SaadSaad-mb4py]

Thank you very much

[@melvinbkruah3183]

Great video💪

[@bulepape1215]

This video definitely helped me with my studying. Thanks.

[@sunshine7549]

BIG THANK YOU

[@thatgirl.aeriel]

thank you so much, this was very helpful!

[@Mermaid333-]

You are amazing ❣️

[@vashakanaga5324]

Excellent thank you

[@MohanG-gv2rb]

Wonderful sir

[@dabananaman9086]

GREAT VIDEO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@SkinByNurseAlicia]

Excellent!!!

[@cherian9679]

Thank you so much for making this awesome video!

[@hooralr6329]

really helpful thanks

[@DjAlexMiamiDj]

Thank you

[@gerardomtz92]

Stratum lucidum is only found in thick skin, such as palms of hands and soles of feet.

[@cutelynarmah8398]

thank u so much sir ,God bless u

[@anupparmar132]

very very Good Sir..........

[@shehryarpharmacist3326]

Sir, you are genius

[@audreygriffin8577]

Thank you professor!! You made it really easy to understand

[@BisratEshetu-ej9sk]

You are a genius

[@tommymayberry3800]

I love your videos

[@muhammadhuzaifa8649]

the rest of lecture is awesome just this one part is confusing at 9:47 when you say this last section has an internal and external part ... can you plz elaborate a little bit more ?

[@sisi_rose31]

You are heaven sent.

[@MahaZahid-fs5bn]

Perfeeect lecture.

[@bash-dl6rl]

The papillary system is a very important system

[@dev_playz3062]

great vid

[@kellengaskill2085]

Thanks bro

[@ma.fedivinagracia1095]

can i use your video for my class?

[@jmo5517]

Hi Professor Dave, I'm studying laser tattoo removal which has an anatomy & physiology course within it. I'm struggling to understand where the hair bulb (that connects to the dermal papilla) actually lies - is it in the papillary layer or the reticular layer? thanks