Joints: Crash Course Anatomy & Physiology #20

We continue our look at your bones and skeletal system, skipping over the silly kid's song in favor of a more detailed look at your axial and appendicular skeleton. This episode also talks about the structural and functional classifications of your joints and the major types of body movement that they facilitate.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

Chapters:
Introduction: Joints 00:00
Axial Bones: Cranial, Facial, Vertebrae, & Thoracic Cage 2:02
Appendicular Bones: Limbs & Pelvis 3:05
Types of Joints 3:33
Functional Classification of Joints: Synarthroses, Amphirthroses, Diarthroses 3:59
Structural Classification of Joints: Fibrous, Cartilaginous, Synovial 4:32
Types of Synovial Joints 5:37
Plane Joints - Gliding Movements 6:02
Hinge Joints - Angular Movements: Flexion, Extension, & Hyperextension 6:20
Condylar Joints - More Angular Movements: Abduction, Adduction, & Circumduction 6:55
Ball & Socket Joints - Rotational Movements 7:23
Saddle Joints - Opposition Movement 7:46
Pivot Joints - Supination & Pronation 8:03
Review 8:26
Credits 8:59

***
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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, Stephen DeCubellis, Vanessa Benavent, Rob Palmer, Dr. John D. Trombley, BouwsT, Robin Duckworth, Kyle "Defender of Awesome" Willis, Damian Shaw, Elisa DeCastro, Johnny Young!

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[drraltz]

Hi Hank!!! 8 years since you posted this video. I still follow you today (2023). I am currently following you and I am now a medical doctor. I still use your videos as a solid base when I need to focus research. Thank you for being my modern-day Bill Nye. Lymphoma has nothing on you. Thank you for being one of our great minds.

[youtubequeen]

Joints
Meeting places between 2+ bones
More joints than bones
Work together to move~muscles contract across joints moving 1 bone towards another
8 cranial 24 facial
Atlas holds head
Cervical 1-7
Thoracic 8-19
Lumbar 20-25
12 ribs
Structural
Fibrous~connect bones with dense fibrous connective tissue~don't move
Cartilaginous~unite bones via cartilage ~don't move ~2 types synchondrodes & symphyses
Synovial articular cartílago, bandlike ligaments, joint cavity, synovial fluid, sensort nerve fibers & blood vessels
Plane, hinge, consular, saddle.pivot, ball and socket.
Gliding movements
Angular movements
~flexion, extension, hyperextensiom, abduction, addiction, circumduction.
Functional

[hannahhuie]

Can someone please write an anatomically correct bone song because college students everywhere need it

[crashcourse]

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

[karenrae]

😄This was GREAT! I've been a professional nurse for 40(!)years now & of course learned all the basic A&P of all parts of the human body. As a 60yr old person living in 1 of these human bodies is also another reason for having a Very basic knowledge of the workings of this extremely useful body😊 However, as this thing ages, there are those minor (if we're lucky) "glitches" that occur now & then. When any of these things become annoying for more than a few days, I generally look to refresh my understanding of whatever system needs some upkeep I may be overlooking. This used to be a quick(or not😕) look thru 1 or more of my old nursing books.
But This is GREAT! & FUN! & Moving!-Really moving!, something my old books don't do, except when I drop 'em. So, THANK YOU! For making this all fun again!😀 ...&, as I watched this on my phone, a whole lot easier than those old text books!

[KateyHach]

A really good way to remember pronation vs. supination is to cup your hand. Supination is when your hand makes a "soup" bowl. (:

[ArakkoaChronicles]

I don't know about you, but I found Hank's bone jokes to be humerus.

[Patissierrouquin]

I'm taking an A&P course online and your videos have helped me go from a C to an A. Thank you so much!! It helps to have images and summary explanations after reading 40+ pages of difficult material. Thank you again!!

[TheHumphrey]

I'd like to take the time to thank you for making these videos; i am taking college A&P, and I often have trouble understanding the content; however, your videos are clear and fun, and they help me comprehend the content!

[edelainemaegabriel]

Our mid-term exam is fast approaching but I find reading my notes all over again boring. Watching crash course is such a better and interesting way to review. Thank you for this <3

[nolanwestrich]

♪ The spine bone connects to the ... Spine bone. ♪ The spine bone connects to the ... Spine bone. ♪ The spine bone connects to the ... Spine bone. ♪ The spine bone connects to the ... Spine bone. ♪

[dennisquinn]

"I am so glad you guys are not five years old..."

...as I watch this with my five-year-old. Lol

[theaterqueen]

I JUST found out that his brother is the guy who wrote "The Fault in our Stars", and my mind is now totally blown...

[GuyWithAnAmazingHat]

When I studied anatomy for my animation art course, we are required to be able to draw someone's skeletal and muscular structure just by looking at their photo and during nude model sketch sessions.

Now when I look at people, I tend to x-ray vision them involuntarily.

[OKARO_ATOTI]

Ooh Hank and John Green. 2 semesters of AP classes, late night cramming sessions. I still can't pick between you and John. Now I watch you guys for the joy of learning. Feels kind of creepy because I don't have exams but I keep watching the shows.
Thank you so much for doing what you do.

[okbye]

i wanted to study biology but ended up crushing this lecturer.ughhh.periodt.

[carlosguerrax]

Hey i'm a nursing student and this was a great way to learn back in my core classes. This can get people interested in medicine or frankly anything to deal with science. Awesome refresher. :)

[dianetietcheu]

He is good, but lord he speaks so quick.

[rangergxi]

So there is a Skeleton inside of me? That is spooky.

[Healtheworldx]

I'm a student paramedic and I have an exam on the skeletal, nervous, respiratory and cardiovascular system tomorrow. Last minute revision might just pay off with this very useful video