Blood, Part 2 - There Will Be Blood: Crash Course Anatomy & Physiology #30

It's time to start talking about some of the terrible things you can do to your own body, like blood doping. We'll start by explaining the structure and function of your erythrocytes, and of hemoglobin, which they use to carry oxygen. We'll follow the formation and life cycle of a red blood cell, including how its levels are regulated by EPO and its signaling molecules. We'll wrap up by looking at how blood doping works and how it is truly a recipe for disaster.

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

Chapters:
Introduction: Blood is Powerful Stuff 00:00
Form and Function of Erythrocytes (Red Blood Cells) 1:34
Hemoglobin 2:30
Formation of a Red Blood Cell: Hematopoiesis 4:11
How Erythropoietin (EPO) Regulates Blood Oxygen Levels 5:43
How Red Blood Cells Die 6:54
Don't Dope Your Blood! 7:53
Review 9:00
Credits 9:35

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Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters

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[crashcourse]

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

[Chiller-pcdv]

The art in Crash Course is so cute. I mean, never before have I ever wanted to hug a cell.

[speedstacker]

Although I was watching this in preparation for a test.... it just blew my mind how complex the life of a single component of your body is. Crazy.

[therambler]

I love the way he just chucks in a funny quip or metaphor every here and there, hilarious, makes the lesson all the more interesting and fun to learn

[TheFireflyGrave]

All these videos are great, but this one was dope.

[DuckyoftheNorth]

Poor Squidward at 3:20 was good. +1 for your graphics team for keeping it fun by being graphic.

[DanThePropMan]

1:54 Sounds like a Shakespearean insult, but with biology.
"You glorified, protein-filled, phospholipid bilayer sac!"

[Etienne.D.]

Sometimes when I feel down, I come back to this video and watch Hank say

"THE RED BLOOD CELL GRAVEYARD"

about ten times, then I remember that life is good

[moonfaire]

I got so emotionally invested in the red blood cell's life and now I'm crying :(

[MstMannerz]

Watching this makes me want a blood cell plushie...

[suheimahmateus]

These videos are the only reason I pass any of my Bio Tests.

[raashidabdullah]

WHY IS THIS SO FREAKIN HELPFUL

Like I’m learning more in 10 minutes than I could learn in a week

[SSmith-dixi]

*Swishes about a glass of water* "This is your blood."
"And this is your blood..." *dumps in a bunch of cornstarch* "ON DRUGS."

[cheeseenthusiast]

3:19 that animated Squidward looks super cool, and you might wanna take him to the hospital.

[many]

this erytrocytes are incredibly cute!!!!

[rawanmohammad]

BLESS YOU!! I can’t imagine my life without crashcourse. Don’t ever stop please

[isectoid]

I'm flagging this video for violence... too much blood.

[isaacrigel]

I loled at the *Red Blood Cell Graveyard* scene, poor old cell ...lol

[alangebhardt]

Ok, had to pause to type this. That image of Squidward at 3:20? WOW. That's pretty graphic. Wasn't expecting that.

[nicoarias]

with out this channel i would have probably failed my finals for collage