The Excretory System: From Your Heart to the Toilet – CrashCourse Biology #29

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Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.

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Campbell Biology, 9th ed.

Table of Contents
1) Homeostasis & Osmoregulation 00:00
2) Urea & Uric Acid 01:30
3) Kidneys 02:49
4) Nephron 03:40
5) Glomerulus 4:15
6) Bowman’s Capsule 04:25
7) Proximal Convoluted Tubule 04:49
8) Biolography 06:16
9) Loop of Henle 07:36
10) Distal Convoluted Tubule 09:23
11) Collecting Ducts 09:57
12) Ureters, Bladder & Urethra 10:45

crashcourse, crash course, biology, science, human, anatomy, physiology, homeostasis, organ, urine, urinary, kidney, ureter, bladder, urethra, osmoregulation, balance, metabolism, ammonia, urea, uric acid, toxicity, blood, nephron, renal artery, glomerulus, bowman’s capsule, filtrate, loop of henle, renal cortex, renal medulla, freidrich henle, diuretic, anti-diuretic hormone, kangaroo rat, beaver, pee, osmosis Support CrashCourse on Subbable:


Lindsey Berg says:

i think i gotta pee


KCee J says:

Although this may sound like a stupid question, I am curious. With what was said about the kangaroo rat and the beaver, does this mean that a beaver would die almost instantly of dehydration if displaced from his natural habitat to a very dry land and a kangaroo rat suffer from water retention if moved to a place abundant with water? I must know!

JamdungNatural says:

Can you speak a little slower? it's like he's racing

Aliza canjura says:

I love watching this  show at half speed because he sounds drunk and its entertaining XD

Maeve Kelehan says:

watched this is biology 2day

John Mark Gil Mecarsos says:

"which empties out wherever you point it" LMAO! I know what you mean. -)

Isabella zzstu Kassa says:

I cannot even begin to tell you how much these crash courses have helped me through honor biology. This channel is a true lifesaver

DareOrDream says:


Joshua Gabriel-Black says:

This guy has to have a teleprompter!

peppermint patty says:

I love this guy. he's awesome. he's funny and he loves what he talks about. I listen to him in the car. studying anatomy made fun!!

Cassidy Napora says:

I learned more in the twelve minutes I spent watching this video than I did in the two weeks  spent sitting in class. Thank you so much!

Anja Maraj says:

Your videos are awesome, love the humor, love the colorful graphics and the information is concise but covers the important points.  I used your videos to study for my massage therapy exam instead of reading the books….Keep doing what you do!!!!!

Vercingetorix says:

did he just say cradle of filth cover band?

Leann Weaver says:

"Empties out wherever you point it."

Gaming Clan says:

Cool video you very smart. You should subscribe to our channel

Pratyaksh Dhiman says:

Your videos are very much grasping but, if slow down you slow accent you can get more views and videos could be more understandable.

Karen Calipus (Kare) says:

Bravo. Excellent video. 

Jeff Pirroni says:

whats that thing at the collar of his shirt? is that a mic? just wondering..

Sam Saucedo says:

What book is that?! Henle: The King of the Excretory System? I can't find it anywhere.

Jennah Portillo says:


A'zani Carpenter says:

2 AM is a great time to be crash coursing on pee.
oh joy xD

Niharika Kaushik says:

Thank you this is greatest video, helped me so much!

Crazy “Sameul Shreedhar” Duck says:

Scientists are so pretentious when it comes to naming things

aebinn newsomm says:

What happened to your suit? Its not the same without your suit!

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