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

[@mandydax]

"Mommy, where does pee come from?" "Well, honey, when a Glomerulus and a Bowman's Capsule love each other very much..."

[@spartanhead8131]

Convinient.

[@vergaraliliana348]

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

[@lazer-exe9178]

Not exaggerating when I say that this channel has saved my grades so many times! these kinds of videos also saves my adhd ridden brain the excruciating pain of reading and re-reading the same pages for hours

[@kavyac700]

How to study for bio tests- watch these videos, read your notes, understand things for the first time in forever.

[@nellyannpopo5898]

Facts

[@ImJustNerd]

😂😂😂😂😂😂😂😂

[@nikosroom1913]

"From Your Heart to the Toilet..." sounds like my last relationship........ xD

[@tiredtofu5082]

same

[@ninax7976]

+Amber a. lmaoooooooooooo

[@reluctantidiot2995]

Lmao .....nice

[@nelswolf]

never had one. ahh the life of a nerd can never get a date.

[@hakeemolajuwonBESTROCKET]

Nel's Wolf lol not for me tho nerd and I have had gf

[@georgebeauchamp3287]

The kidneys are like the pool maintenance guys at the Hilton: constantly checking pH, adding trace chemicals as needed, ready to open the floor drain if necessairy. Good work guys.

[@audreylahman]

Thanks for making these videos! I am a college student at Queens College taking Anatomy and Physiology. My professor seriously sucks. His lectures are 3 hours a week where he rants about being a failed doctor. He gives us powerpoints of notes that are on average 90 slides long and he tests us on information that isn't in our text books. I've been trying to teach myself all the body systems. Your videos are a little more basic/general than my class but they are helping me study. I apreciated the discussion of nephrons and background on Henle in this video. You do a great job of highlighting the important parts of the body, explaining their significance and making it memorable so I won't forget on the test. lol. Thanks! I'm sure I'll be watching more of your videos in the future.

[@artilleryisbetter]

CUNY?

[@plr2473]

More basic than these videos? My god, university level biology must be hell!

[@samsoldseashells2647]

Me: "I need to study for this Health test" Me throughout the video: "OMG I FINALLY KNOW WHY BIRDS DONT PEE" (Future me during my test) "Whats the Excretory System again?"

[@cskinner0129]

Lol

[@GabeNewellDFTBA]

Salty Medulla is a good band name.

[@RRB99]

+Lord GabeN So is Loop of Henle.

[@catsinorbit]

6,633 people passed their tests 114 failed their tests

[@johnlordvicente8982]

Let's hope I'll like this tomorrow

[@mariuszkosek9138]

That has increased to 7,019 passing 120 failing as of today ..... Pretty damn good statistic xDD

[@james4727]

i see these comments about tests on all these video. Is this what is actually covered in highschool? I never took biology im just watching cause i find it interesting :)

[@KonaFalleg]

i've taken biology twice (once in my old school, and currently in the one I'm attending at present) and this is for human biology rather than general biology, although I'm sure he also does videos for general biology. (biology is my favorite subject, in case you couldn't tell)

[@tlrthelegend9794]

10000 passed, and 203 failed now.

[@kateturner8169]

Ok Hank, I seriously have to doubly thank you for producing this series and to all of your crew for making it. I'm studying to take a HESI-ADN test this Saturday, which is an 8.5 hour test that covers math, reading, and something like 6 different sciences, including basic biology, anatomy and physiology, chemistry, etc, and this is helping me gain a better understanding of some of these systems than I did from my actual biology classes. It's a phenomenal study tool, and I'll be recommending this to all of my student friends and my teachers to share. I can't say enough how great this series is.

[@rhondalee300]

Kate Turner how did you do .. I take mines this Saturday and I agree this totally helps me understand better

[@kateturner8169]

94% across the board. Except for math, in which I got a 98. Study the flashcards for the vocab online, too. All these videos helped, especially the chemistry ones.

[@rhondalee300]

Kate Turner I took it nov 12 and made an 72 on a and p .. what did you get on that section and what did you study ??

[@kateturner8169]

Rhonda Lee I got a 94.something, but I studied these videos. All of them, the whole playlist. Take care to note the chemical reactions going on. Also, anatomy directions, at least a little.

[@allofdestiny]

great breakdown! very helpful. wanted to get a quick review before we cover this in class.

[@chellieann3595]

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!!

[@Amiinerz]

my kidneys heard this lecture and now they are offended

[@HeySorz]

My gallblader is particularly upset.

[@KnightGamer724]

You could even say that they are.... Salty.

[@MeiDaGay]

yup very

[@nedabiahwarner6447]

This channel is a gosh damn text book especially for Highschool level Humans and Social biology.

[@nishkaawasthi8568]

Study from the textbook... No quizzes/hw grade. Only one major test for this unit which involves random super-detailed info on all eleven main human systems......... You saved my life, Hank+CrashCourse!!

[@jilldo8881]

my teacher showed this video to my science class. i completely started fangirling.

[@jilldo8881]

Exactly! That's really the reason why I was fangirling! And plus hank too!

[@esbeidysolis7385]

lol !!!!!!!!! btw like your username

[@Teo117]

Thank you for the education. Please never stop teaching so I may never stop learning.

[@Religion0]

Thank you! Thank you for actually making these subjects sound as interesting and as fun as they really are!

[@mulimah29]

"Mango-sized kidneys" Great. Now I want mangoes.

[@abdulwardak9870]

mulimah29 LOL me too ~!

[@williamgrimes318]

The glory of Hank's job is that he doesn't have to wear pants to work...

[@finiteincantatem21]

I'm about to start college this year, with a major in biology. I took AP bio last year, and I took anatomy and physiology. A few days before my AP exam I was trying to study but couldn't focus on my text books and notes, so I decided to watch some of the crash course biology videos (sadly there weren't as many at the time). They were so much easier to study from than my notes, and I got a 5 on the exam! I'm now reviewing the videos so that my brain is ready for college. Thank you Hank!

[@davindersuri2091]

Ur the best and got me a hundred on my science essay for the 5 systemsI'm about to donate for pure comedy

[@shilpakaran1]

"Which empties out wherever you point it!" LOOOOL.

[@itsyourgirlsherika5472]

😂😂😂

[@saku.raphie]

Was a fan during high school Am still a fan now that I'm in college... This still helps. A lot. Keep making these awesome videos. I need them.

[@fostermoody]

I have taken a great deal of biology courses, both in high school and university, and this is the best -and possibly only- description of the excretory system I have ever heard. Until now, all I've ever heard about it is that "kidneys filter your blood which leads to your bladder". Once again, free Crash Course >> ludicrously expensive university education. Nicely done, Professor Green!

[@juniorsantana8656]

this is my first time watching one of your videos and all i have to say is: you ROCK! you're amazing, keep on doing these videos cs people like me (the ones who learn more by watching than reading) need you!!

[@alexandanu]

I like how you explain that medulla is marrow and that the proximal convoluted tubule is the tube near the beginning that is windy. That helps me actually remember all the complicated words. Thanks hank!

[@anjamaraj1944]

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!!!!!

[@Coconutter747]

This is by far the most comprehensive, accessible, fun and effective educational material I've ever seen. Keep up the good work!

[@jonstar91]

i was watching this in class just now, and when he said the cradle of filth cover band joke i started laughing... but no one else did in my classroom... was pretty awkward.... sometimes it really sucks to be a metal head

[@Sillilesshells]

That's amazing. I would have laughed with you xD

[@plr2473]

Am I the only one here who has just been watching and trying to understand these biology videos for fun? I love crash course that much. But this has definitely been one of their hardest series to sit through

[@eenderking9679]

Also, I though it would be kind of inefficient if we did filter out every single drop of filtered water. Let's use an analogy to understand my statement: when you have a fresh new bar of soap, and you use it, there isn't as much soap as there was, but there is still soap. You keep using the soap until it's at that phase where it's small and it will start to break apart. so you get some more soap. So if you didn't get that analogy, basically what I'm saying is that we can reuse the water in our bodies because it's not so dirty that it will hurt you.

[@mariahbrito2257]

If I ever do anything of merit with my degree, I will mention you Hank. This is so helpful. I will save up and donate money to you soon.

[@SonoftheFortunate]

11:04 "Empties out, wherever you point it." HAHAH

[@awesomepossumsierra]

Thank you so much. As someone with a biology professor whom I'm pressed still cared enough to come to class today, you are the reason I have a chance of passing this test.

[@DanielaPerez-ry8fc]

My teacher toldo me to watch this video, its incredible

[@NatalieSimon13]

Always a fan of crash course. I always watch the corresponding videos before starting my A&P chapters. It gives me a basic starting point so that while learning we already have an idea what they are talking about.

[@tamaratko4143]

This is going to help me pass my IGCSE's!

[@randomasiangeek]

i'll be honest. many episodes ago i was no longer able to keep up and am now just listening cause i like people talking to me plus its nice seeing the colorful pictures.

[@ShannonIsJammin]

"Don't do this, but if you were to unravel all of your nephrons..." Oh, phew. Thanks for the warning, I was just about to.

[@Sploodington]

I like the way you say 'Lupe of Henle', because you can actually tell it's 3 words. When I did this in school my teacher pronounced it like 'Lupofenaline' and for ages that's how I spelt it.

[@Pr0ud2beMeyQ]

youve made studying for midterms a lot easier for me

[@cassy1999]

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!

[@Shottas4Twenty]

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

[@shahjahanali6019]

+Aliza canjura stupid question, but how do u put it in half speed? He speaks a little fast. It would help! thanks

[@ronibt]

+Shahjahan Ali Under the settings cog, you have different options and one of them is speed. Hope this helped!

[@hidekiryuga1117]

+Aliza canjura thank you so much for the tip i died

[@g.g.5675]

That's john green's brother! Theese guys are both amazing and John Green changed lives with his literature! Good Job, guys, keep rocking!

[@crazysox305]

AP exam tomorrow...

[@judzmax]

yeah, fuck

[@Bella24Forever]

Studying like crazy

[@mitosistheatre7332]

i see i am not alone. good luck everyone!

[@JackieVargo]

much terrified

[@aaronthebursar]

This is the first I'm learning of any of the systems outside of psychology, so yeah, I'm screwed

[@frhneil1463]

I am 17, actually kind of doing last minute revision, 9 days left for the last exam of high school, (Spm, Malaysia) which will determine where I can go further my study. I think i will put malay subtitles here after spm so my fellow Malaysian can watch this too. Great topic as always, thank you :)

[@magmag262]

Anyone has exams tmr ?😂😂🙋🏻🙋🏻

[@Julian-vv1kk]

Maggie Li yep

[@riamehta7502]

today infact!!!

[@flyingfoxes4630]

O level lmao

[@orbitalda2767]

me

[@stephlanbina7830]

Lol I do !xD

[@nampotiwong9863]

this chanel is sooooooooooooooooooooo good ! fun and knowledgable at the same time!!! I love it

[@jasmitashah6505]

must watch before exams :-)

[@misscheekycheerful]

I have my Biology mock exam in 11 hours and I'm just discovering these wonderful videos! The graphics are so simple yet informative and I'm loving the extra little impressive and interesting facts or bits of historical information that I can throw at my lab partner to make him feel inadequate ;) Awesome videos, I'm hoping these will save my ass for these mock exams, and get me the grade I need for Uni on the real ones. THANKYOU!

[@pseudocaveman]

'Also the name of my Cradle of Filth cover band.' lol'd really hard

[@amt200356]

its amazing when you realize how complicated the human body and how it works and for what purpose we were created

[@r_herobunny]

hank and his brother should do a competition to see who can remember the periodic table song from Asap Science and post a video of them singing it.:D

[@Rainydayswillshine]

Im in my last year of school and this channel is going to save my leaving cert! THANK YOU HANK!

[@not_relevant]

why didnt you include coiunter current mechanisum..any way A LOT OF THAnKS

[@Nerdbraska]

From one (future) biology teacher to another, I'd like to commend you on your continual explanation of latin and latin-based terms. So many teachers just pass that over, but it's important to understand the language of science, and you do an excellent job. Thanks!

[@wrightway65]

HAHAHAHAHA slow the video down to 0.5 speed!! You won't be sorry :D

[@sang-drax5745]

Try it in double time too.

[@SelexaSykes]

GAHAHAHAHAHA.DIED.

[@rozschndr9014]

How?

[@danielopara3816]

That was just too funny. At 0.5 speed It sounds like Bill Cosby is teaching me about the urinal system

[@AwesomeSauceMontes]

lol

[@Raziberry]

And this is the first time I've ever heard it called the EX-kruh-TORY system. Hank's accent is always an adventure for me.

[@TheFireflyGrave]

The white stuff on my car isn't technically bird poop. Mind = blown.

[@bittersweetromantic]

This was a great way for me to learn the excretory system for the MCAT, which had been giving me all sorts of troubles up until now. Thanks so much!

[@oliedason8682]

This helped soooooo much :D

[@draganfly]

This video made this topic so much clearer than HS biology did. Many others were reviews of 6-12 biology, but this was definitely not explained very well at all at my school. Thanks!

[@jeffbouadi7608]

Hank is such a bro

[@theseventhsense77]

Hank. Mad respect for repin the 406. MSU student and Montana native here

[@srys9]

I love ur videos. u have a good, interesting way of saying it without putting me to sleep! ^_^

[@sponkmonki79]

A simple term to remember is "fight or flight". Adrenaline rushes mostly happen when an activity involves using a lot of muscle systems used in fighting or running away. The body limits any system (eg digestive, excretive) that takes energy away from your muscles ie punching arms. It tries to expel waste so you don't have to waste energy. Think of it like "dumping" a heavy backpack to conserve energy in the same circumstances. Google "sympathetic nervous system", it's amazing! I hope this helped

[@ayerishu]

you are too amazing. this is so helpful ^^

[@BAWKERSRULES]

I've got a homeostasis test tomorrow and this was perfect review. Thanks :D

[@AzaniCarpenter_1122]

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

[@bieberfiever98]

Hank is basically the only reason I'm passing bio. Bless his soul.

[@akanksham8034]

He's faster than eminen

[@PriyanshuKumar-ni5ll]

You're right gal

[@LeMikerophone]

Thank the universe for CrashCourse. All these convolutions have been cleared.

[@shannonbrown9114]

Watch 2:00-2:20 at 0.5 speed, im crying

[@anshumanpatnaik7020]

nice

[@yaoibumblebee]

There was an FRQ on my AP exam today about alcohol and urine output and I swear I last cried I was so happy because I watched this last night

[@maggiechandler2139]

This is the first video I've ever watched that you've talked so slow

[@Mr-Hakim]

I am glad my biology teacher showed me Crash Course videos

[@nuttyfool673]

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

[@RachyMellon]

I've found this and a few other Crash Course videos unbelievably helpful, thank you!

[@Andy-fs6ru]

Hi I'm in seventh grade dis is my homework =3

[@RachelMeBaby]

My response is in no way a stab at Hank's video, as I said I really enjoy his videos and think they're nice supplemental resources. I too appreciate what he's trying to do. I was just saying I think its silly to say this video is better than education at the university level, especially since there is a difference between what you learn in bio and what you learn in psio, and that isn't a fault of the instructors :p

[@ProfYounge]

"Why are we so bad at naming things?!?!" And, Proximal Convoluted Tubule is one of the better ones. It's way better than: Substance P or Intrinsic Factor -- names that tell us nothing about their location, function, or chemistry. Great question. You could start a blog about it.

[@vanessabeaubrun2824]

these videos are the best I pass my tests everytime!

[@TheDarkestSixx]

Cradle of Filth cover band? LOL! Awesome how he actually knows about them.

[@yatharthchaudhari5578]

Thank you sir Love From India❤🙏🇮🇳

[@vee5021]

wait so why is sweat connected to the excretory system?

[@9_in_the_afternoon]

Sweat is primarily to cool us down (thermoregulation), but because it contains small amounts of metabolic waste products (like urea, as well as water and mineral salts), sweating is considered excretion. That means that the skin is considered an excretory organ. Hope I've explained that well enough :/

[@vee5021]

THANKS A BUNCH none of the other vids and websites were helpful that much THANKS XD

[@9_in_the_afternoon]

Leo theLion12 You're very welcome :)

[@vee5021]

XD

[@LtotheWtotheTD]

The membrane homeostasis!

[@angelofhell1338]

Thank you for helping me with O level biology. I love you.

[@Splooshi]

This guy is a genius... I think he's secretly Spider-Man.

[@schtroumpfsreveur]

Thank you for this video, it's really helpful and it's going to help me get a good grade on my ib biology test tomorrow.

[@earthpcCHClS]

water reabsorbtion, shmarter reashmortion. do you be what i do all day? lol all day long!!!

[@hanagado9636]

"biology and history videos" its nice to be there during all the development

[@angusswinton8559]

Here because of school check

[@TrayCaddyyy]

studying anatomy/phisiology to be a personal trainer so this is super helpful!

[@microtony7]

Just leave him alone LADSS!!!!

[@destroyallps3s]

Agreed, just take a physiology or anatomy class this is like a nice refresher.

[@Maggot91ify]

did he just say cradle of filth cover band?

[@SempiternalVoid]

yeah I did a double take lmao

[@Maggot91ify]

hahahah this is intriguing

[@ahcokris]

+Vercingetorix I was reading this comment as he said it...couldn't be so in synch if I tried. and yes he does say it =)

[@Maggot91ify]

kristijan ahcin hahaha

[@danksamosa3952]

Cromm Cruach are you assuming gender of the person in the video?

[@MarielleMae123]

I

[@Irockman325]

AP Bio anyone?

[@corpsehound]

That is correct. However, we are speaking about the names for the capsule and not talking at all about the gomerulus. The "glomerular capsule" and "Bowman's capsule" are, indeed, the same.