Today Hank explains the skeletal system and why astronauts Scott Kelly and Mikhail Kornienko are out in space studying it. He talks about the anatomy of the skeletal system, including the flat, short, and irregular bones, and their individual arrangements of compact and spongy bone. He’ll also cover the microanatomy of bones, particularly the osteons and their inner lamella. And finally, he will introduce the process of bone remodeling, which is carried out by crews of osteocytes, osteoblasts, and osteoclasts.
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: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Chapters:
Introduction: Astronaut Bones 00:00
Structure of the Skeletal System: Axial & Appendicular Bones 2:33
Bone Shapes: Long, Short, Flat, and Irregular 3:11
Internal Bone Structure 3:47
Osteons and Their Lamellae 5:05
Osteoblasts and Osteoclasts 5:54
Bone Remodeling: Resorption & Apoptosis 7:28
Review 9:28
Credits 10:13
***
Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Mark Brouwer, Jan Schmid, Steve Marshall, Anna-Ester Volozh, Sandra Aft, Brad Wardell, Christian Ludvigsen, Robert Kunz, Jason, A Saslow, Jacob Ash, Jeffrey Thompson, Jessica Simmons, James Craver, Simun Niclasen, SR Foxley, Roger C. Rocha, Nevin, Spoljaric, Eric Knight, Elliot Beter, Jessica Wode, Julie Kaminski, Steven Ness, Hannah!!!!!, Pamela Genise, Mark B. Williams, Becky Kaplan, William Edwards, Rebecca Carlson, Matthew Tryba, Eric Birchfield
—
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook – http://www.facebook.com/YouTubeCrashCourse
Twitter – http://www.twitter.com/TheCrashCourse
Instagram – https://www.instagram.com/thecrashcourse/
CC Kids: http://www.youtube.com/crashcoursekids
source
LOL! I live how fast you talk. I makes getting info way easier
also… MY WHOLE LIFE IS A LIE! THE BIRDS! THEY LIED TO ME!
me
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!
You talk way too fast.
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
Nobody:
Me watching this for sixth grade science: 👁👄👁
Oh come on I learnt this is year 6 or 7
Thank you, bones. I lie around the house all day so it's kind of lost potential there but still.
Slow tf down when talking
I've cheated the system finally! 😂😂😂
I am pursuing ACE personal trainer certification. Your videos help me to understand and memorize the material easier than those books I had to buy for 600$ lol. Cheers mate
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
I am a teacher i Recommend it to All students
Thank you sir from somalia i watch all time
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: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ
Watching this entire series and taking notes is required in my class. It's a huge part of our grade at the end of the year and I've never been happier that I already watched these for fun.
my god why would you make me think about that oh god oh god oh god oh god
Am I the only one just watching this just to understand the body better, not for school? lol
Harry Potter reference! yay!
Calm down bro!
Love Hank! He makes learning fun. I have used several videos to help teach health during distance learning. I create a Q&A to go along with the videos. Please keep making these educational videos! Thank you!
This is so cool & useful
I'm only in grade five me my teacher is making me watch this!?!?
Who else is watching this because of their teacher in quarantine
his skull is so thick that the iss orbits it
So happy our teacher's making us watch this for PDHPE preliminary studies
IAmBone
its good but you r speaking a bit fast for me to comprehend
your body is a meat shield for your bones
I hate my teachers for making me listen to you talk so freaking fast
These crash course videos are fascinating. I'm hooked.
B37(1)
1:22
2:33
3:50
6:12
7:28
9:15 "for reasons we don't understand" did the scientist try diet….. not like that has anything to do with it… (oh wait..) Apparently vitamin C is a huge part according to a book called Death by Calcium.
ALIVE I TELL YOU!!!! XD
Very interesting and innovative analogues to explain difficult topics in bone.. Speed of narration is OK but bit fast… Great learning. Thanks
Anyone else think he looks like that guy from pbs eons?
man.. you speek soo fast
6:25 I can't unsee the menstrual pad 😂
You talk to much and you now look smart
1:38
umm
first of all say that again
second of all say it slower
Ok mana budak budak semashur
6:44 isnt it two thirds minerals and one third collagen not the other way around?
Crash course is probably one of the greatest channels on yt. your bio and a&p videos are gonna be my study tools for the ap
If he is talking too fast for you, slow…down…the…speed. Easy peasy.
i wanna be a physician and my final exams are in a couple of years so i just wanna have a good start
i have watched this video a hundred times and i just noticed the harry potter reference