Blood Vessels, Part 1 - Form and Function: Crash Course Anatomy & Physiology #27

[@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

[@mariannetouma1891]

Man... about 800$ per credit for a 4 credits physiology course at my university, and I end up self learning here (with more details from the book) Such a waste of money :P Thumbs up to the whole team, the videos are amazing! You'll have my forever gratitude if I get accepted in med school.

[@troyalexander4459]

Hope you got in!! I'm in the same boat right now

[@asajirehgracel6847]

Marianne Touma it is more like you’re paying the curriculum not the learning itself. At least that’s how I view education system in Institutions nowadays.

[@bjones5491]

Did you get accepted??

[@sarah-zd5nr]

did you get in? any advice for what to do to eventually get accepted into med school?

[@Ameeno95]

I wish this guy could take my test for me tomorrow lol ...

[@melissafigueroa1709]

+Ameen Moqbel Same, same :(

[@queenviterythedavada6697]

At least I find this interesting

[@tin6413]

how did the test go

[@Ameeno95]

Tin Gole Cruz I don't remember that exact test score, but I ended up with a B in the class.

[@sushitrash1407]

Ameen Moqbel hi

[@razalrafeeque6951]

Mr. Hank Green, a very big thank you. I am a fourth year medical student that has forgotten all my basics over the break and this whole series is exactly what is giving me hope again and giving the bigger picture you often lose with inactivity. Thank you so much for all the videos over the years. From my A-Levels to my MBBS degree you have been there every step of the way!

[@Fallen0o1]

Hank Green: A better professor than my actual university professor.

[@TrenTonStackZ]

Keep 'em coming guys... I got Nursing school coming up and I'd much rather refresh my A&P knowledge with these than reading long digressing chapters... Great work

[@kerrygriffiths1494]

i know right

[@blackmesa232323]

This always serves as a great vessel for information.

[@anthonyfosu6354]

blackmesa232323 *ba dum tss*

[@SusanWojcucki]

Ok, seriously, stop

[@blackmesa232323]

SubscribeToSyndicate No.

[@UzumakiNaruto-ez8jc]

blackmesa232323 I don't mean to be *vain* but puns on KZbin are unoriginal. ; )

[@dhartmahmed50]

Uzumaki Naruto blackmesa232323 Honestly? No. Just no.

[@juliaz1422]

I've said it before and I'll say it again: I love you and the wonderful content you make! Thank you!

[@drink15]

J Frie Thanks, I think your wonderful too!

[@carterrecker1660]

What, what about her wonderful?

[@thestig560]

I let the entire video play start to finish in an effort to get our beloved CrashCourse team full monetary benefits. It’s the least we can do if we don’t donate to their patreon for helping us pass our class. Thank you Crash Course!

[@omermagen824]

It took Hank less than 10 minutes to do what my teacher haven't done in a year.

[@GingeredHonii]

isn't that sad...

[@sergeybeast]

Omer Magen ? Is how long did it take him to put the video together and rehearse?

[@Thumbsupurbum]

"If you removed all the arteries, veins, & capillaries from a person’s body, and tied them end-to-end…the person will die." -Neil deGrasse Tyson

[@DanielMendoza-qq5pv]

Flintstoned 0 to 100 real quick

[@goldengaming4911]

Flintstoned oh :0

[@imaginationnone9297]

*_o h r e a l l y ?_*

[@truthcantbehide]

Maybe you mean mike tyson

[@nicolasarnold7210]

well duh

[@mcmahonp1]

Brilliant. All biology teaches should be this interesting. Thanks.

[@potzysk2]

Is Hank the best lecturer in the world?

[@Zizzyyzz]

Yes. His lectures don't even SEEM like lectures!

[@siddhantgoyal8709]

Hank Green, making nerd girls' blood vessels say hello since 2007

[@dandra_panda799]

Ikr lol

[@JD-cn8se]

I haven't laughed this hard for a youtube comment under an education video EVER

[@thirunavukkarasuarjunan9402]

123456

[@chloelemaster9723]

Ugh! Finally someone else admitted to adoring him. I don't feel so alone. 😅💛

[@charleneh8084]

I may have to listen to this 50 times, but I love learning from you! 👍👍👍👍👍

[@cancerousvenuszeus14]

i have a test on this tomorrow... literally last minutes crash course

[@christyharris4382]

I'm so glad these type of videos exist to help us visual learners!

[@taylorlucas6489]

All I can say is thank you!!! you have literally just explained something so complex in a way that actually makes sense :D

[@rachellefebres-cordero4625]

Videos make self teaching a million times easier. Thank you!!!

[@Abominatrix650]

I sat watching the end of this with my arm over the back of the chair. Now I can feel the circuit described in this video actually happening

[@veronicasekelik4725]

I had a struggle studying and my teacher jumbled it up in confusing orders. A lot of appreciating to the quality jam packed information of the ENTIRE CHAPTER I needed!!!!

[@jemima2783]

Who pauses the intro to read all the little facts? I do lol.

[@josephgrapes7683]

same

[@alhanoufm5968]

I did too haha 😂

[@deborahblessed8541]

Just did 😂

[@damindadharmapala6858]

me too well some times

[@YELLOGAMERS]

This is my all time favourite crash course ever. Love learning about how it all works out and how intricate our bodies are. Best channel ever.

[@MooMooMath]

Great video Hank always provides lots of helpful information. Great research.

[@eliza-jay4683]

Had a huge science test and watched these videos! A big help they were and they refreshed my memory a lot more!👍🏻

[@szikecs]

I try to remember all this stuff from online learning material for my personal training diploma for few months, feel like some areas just confusing, just had a thought may be I can find some videos, and what I found this amazing videos, it's shows visually and explains verbally on understandable way, he is amazing teacher, it left a week to pick up my knowledge. Thanx for these amazing videos. 🙏

[@scarletward6570]

These videos are seriously saving my life. THANK YOU.

[@DanielSerrano-ub9fc]

I am an EMT, currently a nursing student your videos helped me have a better understanding and another point of view in the wonders of the human anatomy and phisiology.

[@lisbonsasori5976]

That wobbling yellow ball is... hypnotic!

[@Linkous12]

Question: does every cell have to come into contact with a capillary to receive oxygen? If not, does a cell get it's oxygen from an adjacent cell? On a side note, this series has made me almost, *almost*, understand where creationists are coming from. Living bodies are freakin' amazing.

[@uploader109]

Yes, cells exchange nutrients and waste between each other. That's how cartilage, the tissue with the least blood vessels, keeps itself alive and healthy despite not receiving thorough blood circulation.

[@Linkous12]

uploader109 Awesome! Thanks for the response.

[@greg77389]

What's that got to do with creationism? Try *intelligent design.* Young earth creationists deny evolution so their position is pretty much invalid... Intelligent design on the other hand simply argues that complex life was designed by something intelligent rather than solely being an extremely improbable byproduct of an unintelligent event or series of events. The theory of intelligent design does not deny evolution.

[@fizz613]

This guy's speed is no joke. He could teach me 1 year course in 1 night

[@love08shelby]

Thank you guys at CrashCourse so much for your wonderful videos! I always watch them and take notes before exams in my A&P2 class. They really help!! -Love, a future nurse

[@yvettemusteingumatay6360]

Youre so great. You discuss all our teacher discuss in less than 10 mins

[@rajaththemystic]

i am a doctor right now, i wish i had these lectures during my school days..! btw i was searching for more complex physiology for Step 1 haha

[@crazyart789]

We finally watched this in my anatomy class at mortician school! Ive been using it to study for months, just waiting till he showed it in class. I have HANK on the top of my notes that day lol

[@alinebellot8060]

I need to retake A and P 2.. I never finished it. i am studying a head of returning back to school.... I love these videos. they're helping me understand this better now

[@yishi1624]

Thank you so much. ----A Chinese student. You saved my life.

[@yungsloth8336]

Whenever I watch these videos I actually start laughing like, so much is happening inside me and I'm wondering what'll be for dinner lol

[@geniusmp2001]

What's weird is where the CO2 comes from. We know it's a waste product, sure, but a product of what? Well, combustion, in a sense, although we call it cellular respiration. Your cells are oxidizing stuff, mostly glucose, and turning it into ATP. The citric acid cycle that they use to do this produces, as byproducts, CO2 and water. We can use the water, but we send the CO2 to the lungs to be exhaled. So after you eat something, your body burns it, and then you breathe it out. So weird.

[@Xandros999]

Matthew Prorok ...and then it gets eaten by a tree.

[@minhkhangtran6948]

Xandros999 And then the tree breath out oxigen.

[@galikazoid]

Matthew Prorok nice comment, that the body is burning (combusting)...reminds me of stars

[@Spartiatai300]

Matthew Prorok Essentially machines work the same way, interesting shower thought.

[@shantasedhain7830]

+Matthew Prorok not just citric acid cycles and the byproducts are not just water and CO2 . so after we eat something we just don't breathe it out. excretion too is there and well CO2 maybe because for the natural exchange of gases(oxygen and carbondioxide exchange between animals and plants to take place). You're just taking example of specific systems and making things more complex(but calling it weird) without understanding the complexity within these systems.

[@sammibenfield3811]

I am definitely a visual learner and with out these videos I would be lost. thank you!!

[@kennedychristina4226]

Bio Finals Tomorrow 😣😣 Wish me luck 💞❗

[@mustafamirza7064]

Kennedy Christina same

[@kennedychristina4226]

I did good...thanks to this video

[@shortypenguin]

Sphincters! Sphincters everywhere!

[@meepmerp1562]

+Flintstoned We're all just tubes

[@2017daw]

Flintstoned is

[@MadaRook]

Hank mentioned that the blood takes about a minute to complete the circuit around the body back to heart. Well I learned, at my phlebotomy training, that it takes two minutes for our blood to complete that circuit around the body.

[@Enderpearl113]

i have learned more from a 9 minute video than i did a 1 month unit about the cardiovascular system unit in health class O.o

[@soniadiandrea4726]

You're so awesome! If it wasn't for Crash Course, I wouldn't pass a lot of my tests! Thank you so much for what you do!

[@snafer30santhelast57]

1:10 That's how I realised how intelligent he is

[@laurenholloway7513]

Snafer30san the video is scripted lol

[@frozenheat90]

Crash Course Mythology would be an awesome thing.

[@laquiviahand7625]

I have nothing else better to do then listen to this guy speak on blood vessels. Besides this is a pretty good review of the circulatory system since graduating from college. (Meh)

[@jessiklopez0825]

My A&P II professor is awesome , I just like to see this videos so I catch better the info! Great video btw!

[@rizwana547]

hats off to all of you. Thanks a lot

[@herpsenderpsen]

wow, my heart is a cool guy, thanks heart!!

[@ahg9843]

It's summer vacation here In Dubai, but these videos are never depressing.

[@matthewhallasgo3037]

BEST YT SCIENCE CHANNEL EVERY!!!!!!!

[@PinkChucky15]

I remember a lot of the info from my Biology class in college but I love that I still get pleasantly surprised with new, cool information :-)

[@sourekhabheekhoo1109]

Im having a Biology Test today :) I feel much more smart after watching this

[@GervJean]

CrashCourse for Microbiology perhaps CrashCourse ?

[@chihu98]

+GervJean hell yeah! I really wish crash course would listen to us ...!

[@xoxmeg26]

Why did I even buy a textbook... this guy explains everything perfectly

[@Kuciaam]

Love your work - just the right amount of humour to keep everyone interested and waiting for what you are going to say next - thank you!

[@hinashahneel2525]

This is amazing to watch one day before the exam to jog your memory ..... thank you Hankkkkk!!!

[@Joeobrown1]

this shouldn't be a funny topic, but circulatory underpants? brilliant.

[@makmotion7156]

Man, give me your brain. You're seriously awesome

[@ScareSans]

that sounds reaally creepy. surely you realized...?

[@jayvas5044]

Gabriel Wortham lol

[@themanwiththepan]

If each person has 100,000 km of blood vessels in their body, then for 7 billion humans that means we have a total of ~74 light years combined? Did I get that right?

[@rainbowstartiger]

typo: minute 4:13 on the green pop up (tunica media is tunia media) .....Thank you for the video, super helpful in distinguishing the layers of it all

[@Zizzyyzz]

Good catch!

[@akuamirci3345]

3rd semester nursing student. Here for a refresher

[@mayapie4574]

The heart should be better paid!

[@chuckydickens7258]

2:08 I'm eating a PB&J Sandwich as I watch this. :D

[@elizabethCorkins83]

🥜🥪🖤

[@daniellagetzoff51]

Thank you so much!! These videos are amazing. You saved my this year with my anatomy course!

[@LibertangoBaila]

One of the best channel I know. I've been following you for several months and every single time it makes everything really clear in my head. Keep going it's just... amazingly great. Fantastic job!

[@chloeward00]

I had to take a moment after "Circulatory underpants"

[@catloverneko16112]

I have to take Anatomy and physiology for Pharmacy Technician.. you make more sense than the teacher they have teaching the course. I'm using this as another study source for my final exam.

[@darkstar8116]

I wonder how good he will do on a test 😂😂 he knows a whole year of text books

[@francisyanthan103]

I have a presentation tomorrow..!!

[@shanzaazhar7732]

you are so easy to catch in spite of the fast speed

[@elanotea2382]

your blood vessels, expanding... just to say hello :) haha i love it!

[@HiItsKeven]

You guys bring knowledge to the world... for free. Without everyone who made these series possible, I'd be as dumb as the Crack heads around my neighborhood. So all i can say is thank you, as im too broke to donate.

[@pavol5844]

This is absolutely insane. I love ypur work and keep it up. What you do is absolutely insane. Amazing quality and quantity too haha. So grateful you guys put in so much work to make it compelling and interesting.

[@TheHenkalv]

Good video as usual. One thing which I suspect was beyond the scope of the video but which it sounded like you commented on was the process by which hemorrhoids are formed. It sounded like you suggested that these are due to varicose veins, while they are actually due to the formation of arteriovenous anastomosis. Granted both varicose veins and arteriovenous anastomosis are due to increased pressure in the area which is what I suspect you meant

[@studioussoul2303]

Crash Course, man I love you guys! I learn so much from your videos!

[@Na0uta]

I can feel my heart now more than ever!

[@dasboi8386]

i would have failed without this, thanks hanks!

[@SingingCurls]

Yay (: This was awesome. I'm in nursing school & needed a recap of the circulatory system & the different types of vessels. Boom. Just what I got & more (: I loveeeeeee it! Thank you (:

[@libaninho.]

This guy is so funny!! He throws so many jokes at ya until one makes you Laugh Out Loud!

[@shirubionicle]

You guys should consider making some physics videos man. you know, with electricity, waves, forces and motion etc. im taking physics and chemistry at school and your chemistry videos help a lot. so it would probably help if you made some physics videos too.

[@alexabadjon4091]

Perfect timing, i yesterday cut radial artery in my hand, and was wondering about healning and forming new tisues

[@alexabadjon4091]

The Assassin Mushroom lol i didnt cut my self, fucking english, i punched window. almost died of my stupidity

[@tanaygupta5310]

I am preparing for ICSE 2018 and in my book , it is given that capillaries are capable of Vasoconstriction and Vasodilation.

[@Sinusrhythm]

It was awesome... Seriously!!!!best lecture ever sir😍😍😍millions of love to you😍stay blessed😍😍😍

[@naziaalisha1749]

It was great....helpful.. The only thing i want you to change is the pace of your explanation..slowing it down a bit can help me get rid of rewinding it many times

[@naderibrahim3043]

this video made me subscribe

[@trusunamisana5341]

You are a great help...! your videos are beyond words..😍😍😍

[@magister343]

"Tunica intima" is just Latin for "innermost tunic." "Tunica media" is simply "middle tunic." Tunica external" is simply "outer tunic." The terms don't really need much explanation.

[@KiDcash95]

You forgot to insert the Axillary Artery at 4:50, it's between the Subclavian and Brachial arteries. Starting at 1st costal rib until passing the teres major then it becomes brachial artery (:

[@jocelync8236]

idk why this is so hard for me

[@somaiamohamed5315]

Thanks for the video and for the Arabic subtitle💛.. I think that will help in tomorrow's exam 👌😂

[@Jojo43O9]

Anyone else start flexing your thumb when he said thumb wrestle

[@zachariahayi422]

I love this,including the fact that l can put a chocolate inside my heart..Lol

[@ghadahazim7203]

WOWOWOOWOWO you really are amazing in explaining you are saving my life

[@lejardon6625]

First time on this specific series; didn't realise Scishow legend Hank Green hosts it

[@ashleykaelin2070]

So I have this project where I have to "pretend to be a blood cell and take a trip through the arteries and veins to a body part and back to the heart" I searched for this video to learn more about how they work so I have an idea on how to do. I didnt expect to find a cheat sheet. This was still useful tho.

[@mithiahmed3335]

The graphics makes it so cool!

[@ASLduchamp]

At minute 2:57 I'm not the only one reading the pop-up fact and thinking it wasn't edited right, am I? "...Which play a much bigger role in maintain blood pressure..."