Urinary System, Part 1: Crash Course Anatomy & Physiology #38

Even though you probably don't choose to spend a lot of time thinking about it, your pee is kind of a big deal. Today we're talking about the anatomy of your urinary system, and how your kidneys filter metabolic waste and balance salt and water concentrations in the blood. We'll cover how nephrons use glomerular filtration, tubular reabsorption, and tubular secretion to reabsorb water and nutrients back into the blood, and make urine with the leftovers.
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
Chapters:
Introduction: Urinary System 00:00
What Do Kidneys Do? 1:25
Urinary System Structure 3:02
Nephrons 4:13
Glomerular Filtration 4:37
Tubular Reabsorption 5:14
Tubular Secretion 8:17
Urine 8:40
Review 9:10
***
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[@SquatSimp]

This helped more than a 55min anatomy lecture at a university- thank you

[@aaaxel]

bit of a mood ngl

[@alexabourg]

This video makes me realize that I have to stop making jokes about selling my kidneys.

[@jalaldarwish8053]

Giselle Bourgoing Is

[@Tentenn144]

nah u could actually still sell one of ur kidneys and still live normally with no complications.

[@queensheba9792]

@@Tentenn144 You should probably still keep it if you don't need to get rid of it. Because if that one goes down....

[@betterlucknexttime7534]

sell your hair instead.

[@leralto-khutjokarabokapa1646]

Hi I have question . what is the purpose of the motion of water out of the ascending limp into the medulla . is it to move back to the blood or is it for urination . I really do not get it

[@Catlover955.]

Dude if you were my professor, I would be a doctor by now. Your way of teaching just resonates with me so much. So easy to absorb

[@northvanman1283]

This guy makes learning Biology soooo much fun!!! THANK YOU !!

[@choochney]

Ryan R thanks for sharing

[@pearlcorder391]

Ryan R your profile picture makes me happy. I don't even know why. P.S. your totally right they make it alot of to learn :)

[@guglemalik7148]

No way boring sir

[@susannnho]

I just wanted to say that I was able to get an A on my Human AP 2 exam by watching your videos for further understanding of my notes and power points! Thanks a bunch.

[@caitlynmayrandcaitlynmayra5596]

I would lilek to be a emt

[@anjalip9077]

Thanks a lot

[@brodieryan9767]

And now you're a doctor!!

[@khanmc8435]

So what's your profession now? Kinda curious

[@leralto-khutjokarabokapa1646]

Hi pls help me out . what is the purpose of the motion of water out of the medulla . is it for urination or its moved back into the blood

[@aperson22222]

I have to say, when I saw this video in my subscriptions, I was a little pissed.

[@haloelite205]

*badum tssss*

[@danheidel]

+PotatoesAreGood :3 You mean *badum psssss*

[@JennieKerfuffle]

+Dan Heidel I laughed so hard I peed myself.

[@guestguest5128]

+Jennie Kerfuffle really?

[@JennieKerfuffle]

guest guest You better peelieve it.

[@americanbee]

I used to find crash course videos also too fast. I recommend to learn it from the textbook or whatever professor says. And then watch a video super fast for the overview, to refresh and see if you learned it good

[@romainroulier8971]

Marina Zh

[@nolans5906]

Marina Zh same

[@Stothep15]

Highly agree!!

[@santoelectron]

you can regulate the speed you know?

[@marcoperez-maccollum4688]

Actually I feel that watching the videos will give you a good general idea of what to expect in a more detailed textbook. I have a bunch of slides for a class and it works best this way (for me at least).

[@wecantbefriends1660]

Didnt expect to learn how to clean out a refrigerator but here I am.

[@jameswray50]

It's fascinating to imagine how our organisms manage all of these complex processes, and how they came to be in the first place.

[@wholeNwon]

+DaCamponTwee Organs. The kidneys of many other organisms do much the same thing.

[@jameswray50]

wholeNwon Obviously.

[@Netsuko]

+DaCamponTwee something something god created stuff, evolution is a lie etc..

[@jameswray50]

Netsuko Yoshikawa I believe in evolution and I'm an atheist. IDK why people are jumping to these conclusions.

[@Netsuko]

DaCamponTwee I was actually just making a joke as I was expecting someone to jump in and talk about "God" and "the creation of life" and such.

[@macielynn1072]

I’ve watched this entire course too to bottom for my A&P I and II class. It even goes in order by my book. THANK U CRASH COURSE! This channel has helped me on my test like no body’s business

[@jamiekuhn8258]

I am currently in nursing school and this video helped a lot with the current topic of renal failure! Is there any chance that you all are considering creating a pathophysiology course??? These videos have helped me a lot over the last few years and the way that you guys present information is amazing! Thanks, guys!

[@ikaseptiyani9172]

i am currently in nursing school and this video helped a lot with the current topic of renal failur! Thankyou very much😊

[@kikitsar295]

Yes he talks too fast but that's the unique part of it. He holds your attention, great job. Thank you😊

[@rmb.artistry]

Shoot I gotta rewatch this whole video because I was scrolling through the punny comments. Now I'm pissed

[@camobanana1]

Rebecca M better pissed off than pissed on xD

[@leensameer2574]

Me toooooo

[@ruthawallace3702]

You are amazing

[@shortypenguin]

Nephrons, eh? *imagines many tiny Zac Efrons inside kidneys*

[@fsdx416]

LOL Zac Nefron

[@juanitaw156]

WhO iS zAc NeFrOn??😂 but seriously, who is ZAc nefron?

[@mckrokonus]

Wow 20% now I respect my kidneys more then before, thanks kidneys!

[@shyandagger4135]

Crash Course, I can’t thank you enough for making these videos. Anatomy and physiology are prerequisite classes for me and I don’t even know what I’d do without your videos. These videos give me a great basis on each topic we tackle and it helps immensely with understanding the basics. Thank you!

[@MultiCII]

Your explanation as a great starting point presentation and could actually be given at every medical, nursing school…and it would be great for college and high school…because of how you describe pretty much everything…it makes a great overview…you vide many key definitions, anatomy, and functional relationships. Really great!

[@SayaCeline]

This series is a life saver! I'm able to watch an episode after studying to get a nice little summary of what material was just covered and thankfully you and my professor use the same terms!!! You guys are so wonderful!

[@laumay7364]

First, I came here to learn about my kidneys, then I was fascinated by how fast a human can talk and then did he memorize all that information cause I didn't.

[@aidendaniel9812]

No, he reads according to a script prepared before the AP episode which was of course guided by their consultant Dr Brandon Jackson.

[@BeckyMeetsWorld]

This is helping so much for my medical terminology midterm tomorrow. Thank you Hank!

[@yasmeeny1168]

This helped me a lot at school

[@Nwordscissorhands1738]

Starting my new job at a urology clinic next month and even after years of schooling it’s nice to review/refresh the memory with videos like this one.

[@nataliem910]

Love the videos, they are really helping me understand my anatomy class better because I have been having a hard time focusing in lectures.

[@watchlovestanexo]

Thanks to whoever translated this to Arabic ~ Thank you so much 💓💓💓

[@anisaazhari7464]

I really thank you for making this learning video. In this video I can relearn the basics of discussing anatomy which in my opinion is quite difficult. you guys are awesome Crash Course, thank you!

[@CiNdyO3]

Watching these videos never fail to help me further understand my readings! Thank you!!!

[@ginaplopper-norton8839]

thank you so much crash course for bringing all the info that i'm being bombarded with in A&P and making it easier to understand!! it makes putting all the details together much easier!

[@richakapoor1]

bro bring this guy back please

[@rock2946]

Getting ready for my interview with a nephrology clinic (because I forgot everything like a dummy from my med classes 🤦‍♀️). This vid is super helpful and hopefully I get the job!

[@samuelruizgomez2976]

This channel is THE best. It is still helping me to this day even though this was posted years ago, thanks

[@Ghoresovsky]

Perfect timing! I am teaching the Urinary System tomorrow! Can't wait until Part 2 is available!

[@YoungJusticeLuv]

yaaass we're having a test about this soon! This really helped!

[@David-kk4dr]

You have to have a “fast” mind to keep up with his fast presentation.

[@milkman9509]

They have to keep them under a certain time or people will become uninterested. You can always slow down the playback speed if you need to listen carefully.

[@klompmer]

CrashCrourse ! Thank u so much ! I was reading and reading in my native language book for hours until i realised that i didnt understand anything of what i just read. After this and many of your videos, I've learnd the same stuff that is written in my book much easier.. so just wanted to say thank you and keep making videos ! sorry for some bad english =D

[@faizhaaura7621]

the video explains the location, parts of the kidney in more detail, quite understandable, clear explanation

[@jessieevans7600]

I spend so much time cracking up at this guy that I have to keep rewinding to learn all the bits! Thank you for your helpful and hilarious ways of teaching biology :))))

[@garyplaza3485]

Awesome channel, helps greatly with my P&A class. Thanks for giving the kidney a Cubs cap...a World Series champions Chicago Cubs cap! GO CUBS GO!

[@FA-tx1mq]

This is such an informative yet fun approach on a way to learn about the urinary system! You've earned yourself another subscriber!

[@Emma-vb7of]

I used to watch these for fun. I've now had to come back and watch and LEARN them again as I'm doing nursing and lecturer can't teach?? Thanks so soooo much. Love you guys.

[@emberstone1905]

You are really good at what you do thank you for making Anatomy Fun!!!

[@witchbitchgirl]

I pavloved myself into feeling stressed and tired whenever the intro starts playing. The crash courses I watched in ×2 speed on my way to school have definitely left me something to remember for the rest of my life... not biology knowledge, that's for sure 😅

[@imdal888]

I came back to this crash course after reading various books. Now it makes more sense to me. It's also a helpful reference for my teaching demo.

[@sharonbaldwin5004]

This was inserted in to my Biology class reading and l love it. Quick and clear explanation and super easy to understand 😍

[@syddlinden8966]

Just have to thank you guys for these videos. They teach SO MUCH. I recently realized I know more about internal anatomy now than my PT mom does. Thanks for all the knowledge! Keep up the good work! :D

[@adamgoulding4702]

So, I am a procrastinating nursing student that has left the revision for my applied physiology exam very, very, very late! It is safe to say, if I pass which I probably will (just about), thanks will be to videos like this and only minimally down to the lectures provided by my university :0

[@sarasutherland3797]

i always watch your videos before i have a biology test. they help me so much because i can see what my teacher has explained to me. Thankyou :)

[@komalasarikomalasari3523]

Thank you for this video about urinary system part 1, the content is very useful. Can be used as medium of learning for me

[@virginiafulivai2228]

If I could take your brain into my exam next week.

[@peepeevs]

After this course is over, I would absolutly love to see a zoology course.

[@Mystique300]

Great explanations. I just learned about the kidney in class. Facinating!

[@oliviaenriquez8232]

I"m on exchange in Argentina right now and I'm learning about the kidney. Well everything is in Spanish and I have absolutely no idea whats going on in biology class ever and it sucks. I have a big quiz tomorrow and next week is the chapter test and this really helped me understand what is going on. I can understand about 35% of whats going on in the class in Spanish and this video really helped me piece together the extra 65%. I've watched this specific video about 3 times and took notes on this, I cannot tell you guys how much you have helped me and my studying abroad life. Thank you so much! You and John Green are helping me pass my classes one video at a time. Also, my sophomore honors world history teacher would religiously show us the Crash Course videos in her class. Those videos also helped us pass her class and I want to thank you guys for that!

[@milkman9509]

Crash course is so underrated, wish more schools would incorporate videos like this

[@marcusroy8185]

Its amazing how even though he is reading it sounds like he knows what he is reading.

[@biologyencyclopedia9875]

Thank you so much!!!!! These videos are so fun to watch and really help me with studying!

[@phoenixgirl8433]

amazing man...just thank you for your knowledge, passion, simplicity, and thoroughness!

[@Legboy1129]

Seriously? Who disliked this? Probably, Bear Gryils.

[@Legboy1129]

***** Man Vs Wild.

[@ConradJD777]

+CDR. Javik lol good one!

[@greg77389]

Why? What he did was legit. You can distill urine to get pure water back.

[@laxjoh]

+greg77389 This is arguable. It really depends on the pH balance of your urine. If you are passing a lot of water through your renal system and your urine comes out light/transparently clear, you can simply drink your urine and get most of the water released in it back into your body. Over time however your urine will be a higher concentration of ammonia and other things your body is trying to get rid of. At that point, your urine will be too far gone like ocean water. Urine is your body's filtering processes. If you have overabundance of water in your body, you're peeing out water. If you slowly absorb all the water that you can, your urine will sooner or later no longer be useable for a water source. At most it'll probably last you a several urination processes for your urine to start doing more damage than immediate survival.

[@nataliejane8310]

laxjoh CDR. Javik like ocean water, urine can be desalinated and filtered in order to remove substances that cause the acidic pH. The methods used for filtration involve several different sediments, as well as charcoal. (Not the same for desalination) Although, I agree regarding just drinking urine- the substances would absolutely become more concentrated if not filtered effectively.

[@clairemackness7974]

This man is amazing. Always excited to teach. Literally has saved my life so many times😂❤️

[@Maggiemae33]

Still gracefully getting me through A&P, thank you!

[@vrillamelia]

this guy makes learning biology so much fun! thankyouuuu

[@sirBrouwer]

The tubular system looks like a great motorcycle race track. nice and twisty with two speed lanes.

[@nicolasmerino2099]

OMHFG WATCH IT AT 0.5X SPEED HAHAHHA ITS HILARIOUS DRUNK SCIENCE!!!!!!!!

[@5sos631]

heck ya😆😆😂😂😂

[@nazwariandita7162]

thank you, these videos and pictures really help to understand how the anatomy of the urinary system works

[@karolinakoce5777]

This is amazing! For Funeral Services ( embalming) , this is great before doing my exam tomorrow. Thank You!!

[@sighko05]

I'm hoping the next part covers what happens when there's either too much water or not enough water during the problematic section.

[@lagoonroom4600]

Yay 🎉 I have been looking forward to watching this, but now I have to wait a whole week to see another 😔

[@TheRedNaxelaYouTube]

#Crashcourseproblems

[@ragnkja]

***** Report and block them.

[@4571police]

++CrashCourse WARNING STUPID SCAMMING FAKE ALERT

[@TheFireflyGrave]

+Legionare Lets Plays (LLP) You got me to search Twitter for #Crashcourseproblems.

[@vivitrianovitasari3073]

this video is very useful for us, in the video talk, there are some explanations of the anatomy of the urinary system in which the video discusses how nephrons use glomerular filtration, tubular reabsorption, and tubular secretion which are so understandable🙏

[@syaahnz]

thanks for the making video. i'm being bombarded with in A&P and making it easier to understand, it makes putting all the details together much easier

[@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

[@miguelsolorzano6707]

i. love. crash. course.

[@emmastichbury6118]

I have a biology report due tomorrow and this has saved MY life! THANK YOU!!!!

[@robinholcomb1387]

all of your anatomy videos are the reason I'm passing anatomy class. These videos are amazing and so helpful. Thanks to you I will finish school and be a massage therapist.

[@ciarafrost1937]

8:00 Isn't the ascending limb impermeable to water?

[@ActAshira]

This video worth 5 points in the IGCSE Examination Biology paper 42 that I've taken today (28th October 2016)

[@septialia3665]

thank you because this video really helps my learning as a nursing student and adds to my knowledge

[@glauco.l]

Wonderful! Congratulations on a great job! One suggestion is to provide PDF flashcards about the content. It Wil certainly help us to fix them!

[@MissCutiePie20]

Do a video about Kidney Stones please!

[@XFreeStyleZX]

Does Hank do pathology? Kidney stones are a terrific thing to learn, but it'd require at least 5 mins on its own.

[@SusanWojcucki]

+XFreeStyleZX Ooh ooh, CrashCourse Pathology!

[@XFreeStyleZX]

+SubscribeToSyndicate That'd be really cool, but risky to make. A lot of not-so-bright people might start diagnosing themselves and that could be a problem. Although just learning about pathology from a scientific perspective would be fantastic. A lot to learn, too!

[@TaiChiKnees]

+SubscribeToSyndicate I know, right?!

[@stephanieareson]

+XFreeStyleZX I am so sick of catering to the bottom 5%. No one seems to get any attention in the country unless they are willfully ignorant. We really need to stop with the whole excuse that people are "not ready" or "not equipped" to handle information.

[@safirahfurqani5341]

i really like this video, but you are talking too fast

[@alien2rulz]

change the speed of the video, and add the captions

[@Tensi1126]

how can i do that!

[@vivecawang7491]

omg D.O 😅

[@tanishpriyadarshan317]

i recommend watching it once then watching it again with 0.5 speed

[@halileral]

Viveca Wang alıbabanın çıftliği .

[@kristalyari8712]

this was so helpful! I already had a pretty good understanding but this really helped me totally understand the basics! quick review!

[@user-bk7ud6od9f]

Thanks for this amazing video!!!! This is AWESOME!! I almost watch it three times. Although you speak so fast, your pronunciation and accent are so good that I can understand!!

[@West996]

I'm a fan of this guy

[@Photosketch2347]

You’re amine one, Mr. Grinch

[@serlinvalensia3011]

I've watched materials on urination, this video is very good and helpful to studying, thank you!

[@AstralJackz]

OH LORD i have HSC exam which are the high school final exams your examined on to be ranked on whether you can got to University or not in Australian on monday saved my life.... again thx and your awesome :)

[@richardaversa7128]

The structure shown for urea (2:40) is "incorrect", there should be no little white ball up top (no H on the O, as it is a carbonyl functional group and not a hydroxyl). Just a little thing that would bother a chemist but it has no effect on the merit of this great video.

[@StrongMed]

Good catch!

[@zoekempe7474]

Richard Aversa cx

[@deswin15]

I feel like to go peep after watch this video

[@TabzeeKat]

I just did this lesson in BIO and I didn't understand one bit... until now! Thanks!! :)

[@vinaamelia2085]

Thank you, this video really helps us to understand more about the urinary system in our body

[@vsamuels9969]

It would be great if it weren't so fast. It's like watching Alton Brown on the Food Network. Slow down. Great info, though.

[@ClosePr0x]

I like how this dude literally explained how the urinary system works faster then any of my 6th and 7th grade teachers

[@emmahourda3507]

Thanks to you sir, today I managed to pass my exams and get into Medicine! You are amazing!

[@hannahtunks411]

Thanks Hank, hope I remember this during my exam

[@julienn5464]

If you slow it down to .5 he sounds like bill cosby

[@vetrenjacasenje]

HE DO

[@karinowens7750]

Haha! I had to try it just to see. He really does!!! LOL

[@Zeldaschampion]

Another reason why Earth's gravity plays such an important role in boldly functions.

[@spindash64]

But what about boldly going where no man has gone before?

[@Zeldaschampion]

After the invention of artificial gravity and a shielding device against space radiation.

[@DaughterofGodLDS]

Quality video geared towards actual learning! Thank you much!

[@silpaanjl1089]

Thank you, after watching this video I know more about what the kidneys do when they form urine. I know how the structure of urine and urine content. I know the importance of fluids in the body

[@fnfjan]

Tiny correction, the Vasa recta is NOT another name for peritubular capillaries. Vasa recta are the transverse vessels that supply the tubules of MEDULLARY nephrons, in contrast to peritubular capillaries which are vessels that supply the tubules of the CORTICAL nephrons. But a lot of times are used interchangeably.

[@bigoljoe1829]

+Frank Nasrawistien I don't know why but comments like this irritate me so damn much but *fuck*!.. You have a "correction" you feel the need to issue, but then at the end acknowledge the terms *are* used interchangeably? So there was no *need* for your correction other than that you wanted to show people how smart you are? Or what? What the fuck is your damn problem?

[@Telamon8]

+BigolJoe To be fair, a lot of people use "you're" and "your" interchangeably, but that doesn't mean that they're right.

[@fnfjan]

+BigolJoe I don't have a problem, it seems that you are the one that has a problem, and why use profanity?? I made a simple comment for those who are interested, the terms refer to relatively different things, using them interchangeably is a misconception, thus making it inaccurate to use them interchangeably. I just don't understand the point of your comment, it was just a tip for those who are interested, if you found it helpful, good! if not, then just move on with your life.

[@cortster12]

+Frank Nasrawistien And then you go on and type out 'u' and 'r' like an absolute idiot. If you are trying to sound smart, stop shortening your words like a 13 year old teenage girl. It's a word crime.

[@wholeNwon]

+BigolJoe Obviously, when "people" use them interchangeably, they are doing so incorrectly. It's like the stupid people who don't know the difference between there and they're or their. Or discreet and discrete, etc.

[@ninjagstudio5602]

0:00 keep repeating it lol

[@javierestebangomezmonteale2889]

jajaja x2

[@spookyspacewhale1532]

Just wanted to say thank you! My A+P exam is tomorrow and i just couldn't wrap my head around this but now I get it!! Second year vet med here i comeeee :)

[@phoebegeorgia99]

This is such a well done video! Thanks for the help!