The Skeletal System: Crash Course Anatomy & Physiology #19

[@youtubequeen4251]

Bones: Made of active connective tissue Stores calcium phosphate and minerals Hematopoiesis~blood cell production 206 bones Axial or perpendicular | | Vertical. Appendages/others Shape: Long bones longer than wide Short bones short cube like Flat bones thin ones Irregular bones can't classify Compact bone smooth Spongey porous: cross hatching supports (trabeculae)~resist stress & bone marrow red=blood cells yellow =fat Flared ends=epiphyses Middle=dialysis Middle layer=medullary cavity Osteons: cylindrical/weight baring/cented of bone (animation of bone being cut in half they are outside the center hole of bone, and appear to be like frog eggs) Each "frog egg" is a lamellae and filled with collagen fibers that run in same directions. Central canals: hold nerves and blood vessels~nutrients Lucanae spaces by central canals~astrocytes: mature bone cells that monitor and maintain your bone matrix Bone remodeling~ Osteo blasts & Osteo clasts #1. O. Blasts: bone makers Cartilage is framework for bone #2. O. Clasts: bone breakers ~resorption, apoptosis (self destruct)

[@ryja3z]

you ma'am are amazing

[@swagcat7779]

Chad

[@eileenbvanmerk2700]

As a nursing student, we constantly have to go back to anatomy and physiology to understand what happens during disease processes. These videos are super helpful and so much more convenient compared to flipping books open. Thanks so much for these! I was super impressed by how detailed and accurate your A&P videos are.

[@eileenbvanmerk2700]

+Don Blanket thank you! :)

[@sarahnaji4746]

U should make a website and u should invent exams and quizes for students!!

[@shriyasai7521]

Yes please 🙏

[@sweeflyboy]

YASSSSS!

[@iffathfatima9248]

Sarah Naji that would be awesome

[@temple_yan.856]

@@nathanyoder2379 thanks much appreciate that

[@lynns4122]

Khan Academy has quizzes on similar stuff

[@sadielikesyou]

I'm finally going to reach out and thank you via a comment... little do you know, I am a nursing student and I have used your videos for every biology course I've had to take as a quick refresher before exams. I cannot thank you enough for these videos! You explain it in a language that I can understand as opposed to the boring lull of the borderline medical journal of a textbook that I have! (why do they insist on being so sleep provoking?!) So, THANK YOU, your channel rocks and I recommend them to all my fellow students that need a quick rehash. :)

[@nomeslife]

Because studying anything to do with health or medicine can actually get boring but it's people like us that eventually save lives. (that's my motivation)

[@Michaliey]

I’m going through the same thing right now

[@vinsmith890]

I have a test for LPN tomorrow on integumentary and muscular/skeletal. Open book luckily but these videos help so much

[@XxXxmusicnhorsesXxXx]

I am a current A&P student in college and I couldn't understand this from my own teacher. This video definitely helped me and broke it down in a way she couldn't. Keep up with these videos! They help so much

[@mackenziepark5593]

This is how I'm studying for my test in biology.

[@motokid413]

+Mackenzie Park You're gonna fail

[@mackenziepark5593]

+evanups I know...

[@henrygresel8655]

I'm doing this to study to xD

[@Mustafa2219]

did u fail? I honestly want to know.

[@scoobty4449]

hahanice name

[@ericgonzalezmusic]

You are a life saver. U are the reason i pass anatomy

[@Juldaniacanal11]

Eric Gonzalez same

[@marvelousmimi9165]

I hope I pass this class is hard

[@Miaonroblox]

Eric Gonzalez That’s why I’m here trying to pass lol

[@rozhinhamidizareh1076]

As a 14-year-old Iranian student, your videos really really help me to improve my English and knowledge of Biology at the same time. I watch your videos before my classes & they help me to stay on the top of my studies. Thank U!

[@phillipanthonymeeks1997]

I'm so thankful for wonderful people like you. I can stare about my books for hours feeling frustrated about the point not getting through. Y'all make learning easy and fun! If only I could get my BS from Crash Course instead of my college.

[@kaylaarmani1762]

Currently pulling an all nighter watching your videos for my exam tomorrow. I wish i found you at the beginning of the semester. You simplify everything greatly. Idk why professors teach a whole bunch of other junk that wont even be on the test. You get straight to the point. Love it

[@julie3368]

Who else is watching this because of their teacher in quarantine

[@elinascott]

Me!

[@bakesbynoor]

lol mee

[@amyburke5867]

Or are a teacher, looking for videos for e-learning!!!! :)

[@nicolboys6958]

absolutely me!!

[@jacksonharley8550]

me

[@crashcourse]

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

[@SuperProxy_Fn]

Hi

[@azersamaali2016]

I have spent months studying anatomy and found a fantastic resource at Sebs Study Crammer (google it if you are interested)

[@corbinmarion4616]

"Bones, well, their pretty clutch!" Without a doubt the best quote I have heard this week.

[@kimberleysinclair5904]

Thank you Hank. I am a AP Psych and Health teacher and am currently studying RHIT for a certificate from ELAC. Your videos were informative, entertaining, fast and I learned things I did not know before. I will change how I teach Health and AP Psych thanks to Hank. You are a live saver!

[@jordanwoods146]

You should do a video on Intramemberous and Endochandral Ossification!

[@kary2783neto]

What the heck you saying Jordan????

[@juandavila2999]

I

[@christofferenfors3676]

Just got 5 out of 5 in my A&P Test. Is there anyway I can have a very long and seemingly akward 3way hug with u and ur dog? U guys are something else!

[@sameersheikh7603]

I'm a year late but congratulations! :D.

[@livelifeandlaff2412]

im 2 years late but congraats

[@Disha-k4f]

Im 3 years late but yay you!

[@chrisbailey5713]

I always do studying up before the Skeleton War I need to learn their weaknesses.

[@kid14346]

Chris Bailey According to this video, send them to space. They will consume themselves!

[@eternalaether8463]

Chris Bailey We will defeat you fuccbois

[@JoseJose-sh7fr]

Find the necromancer controlling them, without him the entire skellymen army will just be reduced to some not-so-spooky normal skeletons.

[@kid14346]

joseph clisham Plot twist! The Necromancer is a skellyman!

[@julli4821]

??? XD

[@joanmubea5469]

This is my favorite "professor"..... Thank you!!! CrashCourse has become my favorite learning site. You explained it so well!!! Thank you!!!

[@Glaerdrune]

"We also have to figure out how to keep their bodies from consuming their own skeletons" is the most hardcore phrase I've heard all week

[@babyz1218]

I wish you would slow down when you speak, sometimes I'm trying to process what you'd just finished saying and in that span of time you've already moved on to two other things. Thanks so much for these videos though they're really helping me with my anatomy class, I'm a visual learner xx

[@christofferenfors3676]

Seeing as they need to cram a lot of information into a concise but informative video, speed is important. You can always pause it and re watch it! :D

[@henryl3734]

baby z OMG this is same af

[@Glaerdrune]

You can change the speed of the youtube video in Settings if that helps!

[@davidschmidt6013]

Glaerdrune, you'er right, you can....it would be nice if they'd include a .75 setting though. (After all, they offer more options to speed up than to slow down.) At .5, he's just as hard to listen to but for the opposite reason. ...lol....I'm an American but teach Science here in Thailand, and would like such an option, as most of my kids are non-native speakers. Ya hear, that, KZbin admins? We want 75% playback speed!!

[@dorony1983]

You want to slow down read a book for few hours and study. Once you feel you ok with topic and need a quick refresh, watch it.. And it's going to be a great review. English is my second language and I understand him perfectly. That's actually a good practice, because in med school that's how studying should be.. Very very fast

[@GabeNewellDFTBA]

This video is 2spooky4me. May Mr. Skeltal bless you with calcium

[@GabeNewellDFTBA]

Jetfuel Steelbeams Your name is 2dank4me.

[@DarkLordToturials]

Lord GabeN There is a skeleton inside you RIGHT NOW Spooked enough

[@GabeNewellDFTBA]

DarkiLordito Warn me before you spook me so hard.

[@DarkLordToturials]

Lord GabeN You must always be aware of the spookyness

[@cyanidegiraffe615]

Jetfuel Steelbeams but im not a rappa

[@emilyevans3311]

First off, I am a nursing student who got thrown into A&P first class and i scored my highest grade on my exam after refreshing before-hand with your videos. thank you so much

[@HiThere-yy8zk]

I have to do a 20 slide "slideshow" for a final. My textbook is so confusing. literally bolds and italicizes everything that is important. Crash course is the only reason I'll be passing this year. I'm just watching these videos. I won't even bother reading. Thank you Crash Course! You guys are the absolute best!

[@GuerreroAnthrax]

Currently studying to receive my NASM personal traininer certification, I'm terrible at studying but I have not only found but also understood all the material on the test through your videos, thank you so much I will definitely be contributing to the channel through patreon!

[@tsirbuts]

I'm cramming for an anatomy test so I'm watching all the videos that I need for the test 😂

[@notPalores]

How’d it go?

[@catchersgirl]

Sebastian Honores I think your a few years to late 😂😂

[@rnj117]

oh my god ! this is on the syllabus for my exam in 9 hours time !!! Once again I say thank goodness for Crash Course, cannot express how many times this series has saved me !

[@taiipotatoie]

6:25 I can't unsee the menstrual pad 😂

[@zazhiita]

I can't believe I read a whole chapter of several pages and it took me an hour and like 15 min to kind of understand it, and then you come and BANG! in 10 minutes you explained it better than any book could ever have.

[@Amberhhhh]

This makes me feel like I'll be okay for my test

[@LilDaz690]

Thank you for creating these classes! A&P online is pretty difficult, you make it a bit more interesting and helps a lot!

[@jrogue3710]

Hank you honestly are my favourite everything! You are helping me through SO many classes where my teacher sounds like hes speaking friggin German when explaining anatomy. When I become an RMT, you have a free massage ready for you as a thank you!!!! I had NO idea just how medical this profession is going to be or the training to get there. You are saving me!

[@katieroulier2875]

Thanks!

[@chrisberggren2700]

I never knew there was this much to bones. This video has greatly educated me and will definitely help as an EMT. After watching I have a much better understanding on why bones can be strengthened and how they regenerate. Thanks to osteoclasts and osteoblasts bones can become stronger!

[@childrenofthelightvelichat6074]

Any 2024 related😂😂

[@jesserobin3689]

I think I'm literally crash course's biggest fan. I love this channel! If it wasn't for crash course I probably wouldn't be doing as well at varsity as I am. The visuals are also a big help. Thank you, Hank.

[@anthonyfosu6354]

Keep these awesome videos coming. Thank you CrashCourse A&P for being the spine to my KZbin education.

[@charlottesienna]

The osteoblasts and osteoclasts are so cute- Thank you to the graphics team for personifying Anatomy and physiology! I love it

[@Bossyglossy1]

I can't thank you enough...Excellent analogies!!!

[@NykolXOXO]

I love Crash Course. Not only is it informational, it's diverting to watch and it makes learning fun

[@unusedspacesr2740]

Im done with school and still watching crash course just for the heck of it

[@thelostchurches9366]

As a visual learner, I have watched over and over and over again and believed or not, it did help me a lot. Thank you so much for it.

[@shayna1182]

LOL! I live how fast you talk. I makes getting info way easier

[@CrispyFriedPickles]

Wow, this video saved my life 😂😅 I’m definitely a visual learner because I have gained more from this short 10 minute video than I did from a 2 hour lecture in my Anatomy class! 💯🙌🏾 Thank you for making these!!!

[@x612x]

I have waited for this SO long! Being a physical anthropologist my self I loved how you dealt with this subject :)

[@illblues1072]

I’m using this to review my knowledge during quarantine, and free education is incredible, people should use this more often + I wouldn’t mind if they ever decide to put ads

[@loudejesus5973]

I was supposed to make a pun about the skeleton, but none of them seemed "humerus".......... I'll be here all week.

[@geraldellis1177]

THAT WAS A OST-EONTASTIC PUN

[@micanikko]

@@geraldellis1177 That was even worse.

[@mariacyrilbaldovino1373]

Lol 😂

[@shaymaasuhair8223]

I'm here and its been 4 years... lol

[@suhailb.2955]

I'm a Pre-med student starting medicine soon. Our Prof came today and said "you guys have been performing excellently so far, lets throw in some MD anatomy in your skeletal system content, you'll thank me later". Long story short, here i am learning about the skeletal system and then I gotta learn the name of 50 bones after this video. Feelsbadman

[@riversong7818]

Even though certain life circumstances prevented me from pursuing my lifetime goal of becoming a physician, I still love learning all I can about our miraculous human form! I am especially interested in diseases and rare diseases that can, and do, afflict our mortal selves and the advances (and failures) that so many dedicated researchers, scientists, physicians and nurses have devoted their careers to understand, and to hopefully discover the treatments and cures so many us are looking forward to! Kudo's to you all!

[@qualifiedcornstarch6859]

I know this is just me, but I have trouble listening to people IRL because they talk too slowly. Hank is the perfect speed for me to listen to, and about the same speed that I talk unless I'm consciously modulating my speech (which I end up doing 90% of the time).

[@lizardinabigwizardhat]

There needs to be a crash course statistics because a lot of students in AP Stats are not doing so hot

[@karinaidiyatullina6897]

facts

[@pelecranileboi9011]

There is one

[@MetalPcAngel]

Spooky, scary skeletons ♫♪ send shivers down your spine♫♪ Shrieking skulls will shock your soul ♫♪ Seal your doom tonight ♫♪ Spooky, scary skeletons ♫♪ speak with such a screech ♫♪ You'll shake and shudder in surprise ♫♪ when you hear these zombies shriek ♫♪ We're so sorry, skeletons♫♪ You're so misunderstood ♫♪ You only want to socialize ♫♪ (but I don't think we should) 'Cause Spooky, scary skeletons ♫♪ shout startling, shrilly screams ♫♪ They'll sneak from their sarcophagus ♫♪ and just won't leave you be ♫♪ Spirits, supernatural ♫♪ are shy, what's all the fuss? ♫♪ But bags of bones seem so unsafe ♫♪ It's semi-serious! ♫♪ Spooky, scary skeletons ♫♪ are silly all the same ♫♪ They'll smile and scrabble slowly by ♫♪ and drive you so insane! ♫♪ Sticks and stones will break your bones ♫♪ They seldom let you snooze ♫♪ Spooky, scary skeletons ♫♪ will wake you with a BOO! ♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪♫♪

[@Flaggirl1204]

MetalPcAngel i love this song it is awesome

[@abbiedaydreamr636]

YAY THE SKELLI SONG :D :D

[@KnightsOfBellamy]

THANK YOU SO MUCH FOR THIS COURSE YOU HAVE NO IDEA HOW IMPORTANT THIS WAS FOR ME!!!

[@DGSEagence]

I am so grateful to have access to such a high quality for video. The free access to the knowledge is one of the most important thing in the world. And each of your Videos is a great treasure! Many Thanks for all these videos.

[@omsafeya]

Thanks for the Arabic translation 💟 and you are a great teacher 😊👍

[@tahaahmed9722]

Nice name.

[@TheCMA19]

you dont know how much these videos have helped me with my college anatomy and physiology class

[@aarushigrover6674]

Dude you are amazing!!!! U make me love the subject! Don't listen to any negative feedback! Keep going! Love the way u talk so fast! So don't give it up!

[@sijalshrestha605]

yes.. feel same here

[@julli4821]

Yesssssss~ I fully agree!

[@brendaolson5181]

agree! make me smile while learning

[@yourroyalhighness6297]

Yes. Maximizing time is most appropriate when creating videos, and perhaps, the viewers shall adjust the speed into 0.75x if they can't understand fully because the channel never asked them to watch their videos. Hahaha, This is just my opinion.

[@pragyapandey2517]

Ekdm Sahi boli.. ❤❤

[@SintelPutnam]

Thank you for being clear on phrasing. Many lessons seem to mash and words do not come out very clear. I actually caught up with this vid.

[@barbietESO]

I just wanted to say thank you for all your videos, and making them interesting and funny while teaching. I home school my 10 year old son, and he absolutely enjoys watching your channel

[@whatrtheodds]

Fast talk benefits- I seem to get exactly what he's talking about if I already put in study. If I haven't I get lost. REALLY good marker of where I am at. Also a quick way to skip past anything I don't want to hear. Loving ur work. xo

[@randomgirl01300]

His haircut is so cute!

[@maddiedhiya9659]

randomgirl013 He's cute :)

[@Lily-si6uo]

o.O

[@kary2783neto]

@@maddiedhiya9659 Nope he is not cute in my opinion he looks like idk can't explain ;-;

[@EDS2314]

Holy fuck, these 10 minute videos are so much more informative, enlightening, and easier to follow than the 50 minute lectures I've been watching to study for my exams. Thank you so much from an extremely visual learner. I just cannot study from a textbook and these help so much.

[@geraldellis1177]

6:28 YOU GOTTA SEE IT #YOUR INSIDES WILL SHED WHEN YOU SEE IT

[@annelinerauch839]

The body is freaking hardcore! Wauw. Every single time I learn something new about life, and especially the human body, I am amazed that I am alive! It's incredible how complicated yet beautiful it is.

[@abbiedaydreamr636]

Yay I'm not going to fail my science project after all :D

[@martacartoncampbell6742]

So eloquently and refreshingly presented!! Thank you so much. I learn something new every time I revisit. I only wish the speed could be less vertiginous. Amazing work 🙏🏽

[@llarejayll]

Encouraged me to not imagine what a torsion fracture may feel like... Paused the video to take a couple of minutes to recollect myself

[@gracebrewer4281]

These videos are fantastic as a preview for new material and an overview before exams. The pace is perfect.

[@m3gal0z3r]

thank mr skeltal for calcum and strong bone

[@SuperRedNovaDragon]

Hank be my professor. I feel like I'm smart again, I wish learning in school was as fun as this.

[@intertain595]

Hello- ur video really help me understand but can you please make a video more about the bone the endochondral ossification and intramembranous ossification about there formation of steps:)

[@hopefulstorms5049]

This method of teaching/lecturing really works for me.

[@nocturne.op9]

this is sooo weird but you guys are kinda synced up with my biology class lessons...you uploaded this video on the week we started learning about bones and stuff,and the same was with the nervous system and the "vision" one,where we started learning about eyes.... reaaalllyyy curious

[@tiren535]

I love my professor for playing these videos in lecture!!! 😍😍😍

[@raven2269]

Anyone catch the Harry Potter reference at 2:09

[@udayininamineni3210]

yup harry's 2nd year

[@rahulpillai2669]

Yeah

[@kehwie12]

yes, it made me so happy

[@winonaponcespeaks]

To all the people saying he needs to talk slower please shut up and pause the video or rewind and contemplate what he is saying. The beauty in his videos is they are so short because he speaks so quickly and includes so much information in such a small set. He teaches what it takes my teacher in two hours in ten minutes.. again shut up !!

[@exole0014]

I wish your my Professor

[@pragyapandey2517]

Same here... My wish too

[@deemaahmed941]

i swear you are just soooo good with explaining and representing visual models to help us understand the material ! thank you

[@patrickwilson3835]

It's sad when a Ph.D. professor cant explain something this easily!

[@runfreeparkour3241]

this is by far the best study resource ive ever had. Cant even describe how helpful these videos have been to me. Thanks crashcourse.

[@SintaMukti]

thank you crash course...

[@Samgunfire]

This channel is the only reason I'm passing my AP courses

[@mgs1398]

so is that why people say they aren't fat, they're 'big boned'?

[@amelia5665]

mgs1398 denial

[@melissalouis1680]

A!

[@PranamyaPradeep]

@@amelia5665 heavy bones are a thing- but they don't make you LOOK fat, they make your actual weight heavier than what you look to be

[@jaelipeterson8746]

These videos are so helpful! I should be paying my tuition to you! Thank you!

[@ZhasulanAmangeldy]

Please make historical video about middle asia

[@ianpleake6682]

that table of contents is AWSOME I wish every video had that

[@shwetakhade6531]

Thank youbso much. You made me interested into the topic.

[@layawatchesyoutube3864]

I love this guy he breaks it down and animated it so I don’t lose focus easily 😂

[@Technowhy]

This is super helpful~~ :3 (more helpful than my actual teacher...XP)

[@skygoneinc9962]

I don't usually watch stuff like this, but it was super engaging. Great content!

[@MzShonuff123]

I wish I'd seen this before I took my test.

[@alishacarter3916]

Brilliant video! I'm a first year nursing student here in the UK and have my anatomy and physiology exam tomorrow, so its great for some last minute revision. Thanks!

[@iman1922]

"Hormone hotline" I'm writing that on my test for sure.

[@Leopr1]

Very mind opening video, didn't knew the skeletal system was so complex.

[@clp480]

I LOVE YOU GUYS! I LEARN MORE FROM YOU THAN I DO FROM MY TEACHER! WHERE CAN I DONATE FOR YOU GUYS!!!!

[@Harmageddon_Gaming]

It's in the description, I believe crash course uses subbable

[@vanessahernandez8524]

I love watching these videos before an exam, thanks a bunch for summarizing key points to keep me focused :)!

[@meiting9878]

you need to talk a lil' slower. other than that, thank you for your videos. they are truly helpful!

[@thestarscreamER1]

you can change the speed if you're on a computer

[@BulbulChan5]

'you need to take a lil' shower' is what I read LOL

[@samanthacohen7272]

I thought u said 'You need to take a lil' shower' 😂😂😂

[@winonaponcespeaks]

you need to pause or rewind these videos are perfect and the reason they are so short is because he talks so quickly.

[@mellissamcpartland740]

Probably my favorite A&P episode so far! It was adorable yet informative!

[@dagamerking]

I have a hypothesis id like to express, my idea is that while in null g or zero g the bone cells are tricked into thinking that your in the fulid cavity called the womb, that simulates null g. Why do i say this, well i personally talked to a nurse friend of mine and he mentioned that newborns have very rubbery skeletons, more cartilage and connective tissue than calcium phosphate that is our bones. If our bones think there in a womb like state then they want to get ready for birth, that involves reducing the mass of our bones in our body. It is just a hypothesis, if anyone has anything thed like to add I welcome it.pardon any grammatical mistakes it natural.

[@subinrajck]

Collin Bruce Yes Collin, I think it is a very plausible hypothesis. The zero gravity could trigger the signalling of osteoclast activity and inhibition of osteoblast cell cycle. There has been report published that supports this hypothesis : www.ncbi.nlm.nih.gov/pubmed/23637819 But whether or not this is analogous to fetal development in the womb is yet to be determined. I think somebody should start working in this direction to establish this.

[@amelia5665]

In a round about way, yeah I get what you're saying

[@MartyMeganium]

This has got to be the best one yet! I don’t even think I have to know this stuff but I was just enthralled