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

[@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!

[@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

[@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

[@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

[@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?

[@Fallen0o1]

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

[@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!

[@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?

[@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

[@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. 😅💛

[@potzysk2]

Is Hank the best lecturer in the world?

[@Zizzyyzz]

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

[@mcmahonp1]

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

[@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

[@scarletward6570]

These videos are seriously saving my life. THANK YOU.

[@lisbonsasori5976]

That wobbling yellow ball is... hypnotic!

[@rachellefebres-cordero4625]

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

[@fizz613]

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

[@charleneh8084]

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

[@MooMooMath]

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

[@yvettemusteingumatay6360]

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

[@sourekhabheekhoo1109]

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

[@cancerousvenuszeus14]

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

[@eliza-jay4683]

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

[@shortypenguin]

Sphincters! Sphincters everywhere!

[@meepmerp1562]

+Flintstoned We're all just tubes

[@2017daw]

Flintstoned is

[@snafer30santhelast57]

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

[@laurenholloway7513]

Snafer30san the video is scripted lol

[@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. 🙏

[@rizwana547]

hats off to all of you. Thanks a lot

[@herpsenderpsen]

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

[@akuamirci3345]

3rd semester nursing student. Here for a refresher

[@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.

[@kennedychristina4226]

Bio Finals Tomorrow 😣😣 Wish me luck 💞❗

[@mustafamirza7064]

Kennedy Christina same

[@kennedychristina4226]

I did good...thanks to this video

[@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.

[@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!

[@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

[@frozenheat90]

Crash Course Mythology would be an awesome thing.

[@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!

[@yishi1624]

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

[@ahg9843]

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

[@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!

[@GervJean]

CrashCourse for Microbiology perhaps CrashCourse ?

[@Spideygirl101]

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

[@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!

[@Sinusrhythm]

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

[@jessiklopez0825]

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

[@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.

[@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)

[@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 :-)

[@jackemilio1332]

these videos are what entertaining and informative are

[@trusunamisana5341]

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

[@hinashahneel2525]

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

[@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

[@matthewhallasgo3037]

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

[@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.

[@studioussoul2303]

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

[@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

[@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

[@daniellagetzoff51]

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

[@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

[@Bowyerma]

I like this, this is like PBS but 10x more fun!!!

[@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

[@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.

[@shanzaazhar7732]

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

[@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

[@makmotion7156]

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

[@ScareSans]

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

[@jayvas5044]

Gabriel Wortham lol

[@naderibrahim3043]

this video made me subscribe

[@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!!!!

[@xoxmeg26]

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

[@Na0uta]

I can feel my heart now more than ever!

[@mithiahmed3335]

The graphics makes it so cool!

[@elanotea2382]

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

[@kemora101]

New subscriber here. It's amazing how much this helps (in so little time)

[@shonacole2124]

love love crash coarse, god bless you!!!!

[@dasboi8386]

i would have failed without this, thanks hanks!

[@ghadahazim7203]

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

[@chuckydickens7258]

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

[@elizabethCorkins83]

🥜🥪🖤

[@MA-qg8qb]

Mr.Hank thanks alot.. you have this topic much easier.

[@francisyanthan103]

I have a presentation tomorrow..!!

[@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 (:

[@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

[@alhanoufm5968]

Oh god I LOVE YOUR CHANNEL SO MUCH ☹️💘💘💘💘 .

[@DarkMatterX101]

At 6:45 do you see the animated thing that pokes out around Hank's shoulder? It's on the right side of the video and occurs again at 6:41. Does anyone know what that is?

[@Fran-xf6yf]

thanks for this video!! i was just wondering how does the blood make you lose heat?

[@Sherirose1]

Frances Holder when you're feeling hot, vasodilation occurs, bringing more blood closer to the skin and heat dissipates.

[@Joeobrown1]

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

[@Rosey8234]

Thank you so much! I definitely understand the vessels now

[@nicknordstrom7509]

spectacular video--also enjoyed the credits you guys are adding at the end--thanks

[@Permanentlearning]

Very informative video. Great job

[@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.

[@jocelynmurcia2712]

AMAZING!!! I LEARNED MORE HERE..... THANKS!!!!

[@ulziibuyanenkhtur6508]

Great 👍 very easy to understand and very good illustration. Thank you so much 😊

[@mayapie4574]

The heart should be better paid!

[@darkstar8116]

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

[@thismarch_x2335]

I just found this channel & I love!!

[@christinayanez874]

Thank you s much for these videos they helped me understand A&P material so much more!!!!!!

[@sammibenfield3811]

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

[@alejandrobugarin9146]

Thank you, for this video. It is informative.

[@chloeward00]

I had to take a moment after "Circulatory underpants"

[@Travelingworld212]

love this vedio ....