Blood, Part 1 - True Blood: Crash Course Anatomy & Physiology #29

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Now that we've talked about your blood vessels, we're going to zoom in a little closer and talk about your blood itself. We'll start by outlining the basic components of blood -- including erythrocytes, leukocytes, platelets, and plasma -- as well as the basic process of hemostasis that stops bleeding, and how antigens are responsible for the blood type that you have. By the end of this episode, you should be totally prepared for your next blood drive.
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: Let's Talk Blood 00:00
How Blood Donation Works 2:00
Blood Components: Erythrocytes, Leukocytes, Platelets, and Plasma 3:00
Plasma - Electrolytes 3:38
Plasma Proteins 4:03
Hemostasis: How Bleeding Works 4:30
Antigens & Blood Types 6:21
Review 9:05
Credits 9:32
***
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Mark, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters
--
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Опубликовано:

1 июн 2024

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Комментарии : 946

@crashcourse 4 года назад

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

@yesicahernandez5846 6 лет назад

Passed my first anatomy class, and now you're making life easier for A&P II. We appreciate you Hank! (and team)

@nicktekula4928 7 лет назад

Honestly the best page on youtube for all students around the country. And the world for the matter

@somaliyahh 7 лет назад

Nick T world*.

@toba6919 6 лет назад

JUP! watching from Holland and probibly saved me from a 3 (F)

@toniaa-y3559 6 лет назад

I'm in West Africa and this is the only reason why I am not lost in class

@thousandsummers134 5 лет назад

Yup, I'm in Thailand. Crash course has saved me in soooo much.

@yashasvipurohit6910 5 лет назад

India here...this awesome channel has spread far n wide

@crimbleland Год назад

Coming back to thank Hank years later. I now work in healthcare and so much of my basic knowledge I’ve learned because of this crash course. Thanks Hank!

@skizzler1232 4 года назад

Cut appears* Bacteria pops up: are you ready to die you cell?!? Platelete: Hold my coagulation factor T-cell: am I late to the party??

@alyssawinters6632 5 лет назад

You know you're too deep into crash course when Hank starts getting more attractive as the semester goes one.

@blackmesa232323 8 лет назад

Watching this is a bloody good time. Hank almost red my mind.

@kitsunekyubino9345 8 лет назад

blackmesa232323 You should go to the _pun_ itentiery.

@UzumakiNaruto-ez8jc 8 лет назад

blackmesa232323 Didn't I tell you puns run in my *blood*. Be *A positive* part of the pun community and tell the others I'm the king, also tell them not to *B negative* about the new blood dynasty. Failure doesn't run through my *veins*. Where the *bloody* hell are my pun fans? You *aorta* be a fan too.

@blackmesa232323 8 лет назад

Uzumaki Naruto claps.

@guyshepard9658 8 лет назад

Puns aren't funny your efforts are in vein.

@UzumakiNaruto-ez8jc 8 лет назад

Guy Shepard You don't have the heart to continue.

@Daywalker777r 8 лет назад

the human body is like one awesome team with a terrible captain at least for me

@lycheemyusic 4 года назад

LOL tru

@moyopengu7021 4 года назад

lol

@ricchburglar 4 года назад

here take my money 💰x300

@atiquakhan3218 4 года назад

Your profile is the expression for this

@nasrinn812 7 лет назад

Crash course is the best channel on RU-vid for students like me. They really make things easier to understand and thank you 😊

@heathercarter1297 6 лет назад

Just wanted to say thank you for your videos! I started watching your videos in 2015 when taking prereqs for my RN. Now I am graduating next week! You've helped alot with concepts.

@pereiramariana35 8 лет назад

my mother was rh negative and i was her second child with rh positive, they didnt know until i was born and i had to have blood transfusions as a new born, im so glad this was so well explained, i myself had a hard time understanding and explaining this to people, you guys are the best :3 love from a positive, who still doesnt know her blood type other than it being rh positive

@iwanebbing4944 8 лет назад

***** why suing...? You don't know her (i assume she's a she) age. The prevention of giving anti-RhD to RhD negative mothers with RhD positive baby's is not that old...

@whatsinaname7289 5 лет назад

1:50 "... a part of you that is literally irreplaceable!" *goosebumps* JUST AMAZING INTRO!!

@aaronhughes1815 Год назад

Passed my first anatomy class with the help of these videos and I’m currently crushing A&P II. If you’re struggling just keep watching crash course!

@MarissaLaipsker Год назад

Thanks for helping me and all of my fellow nursing students pass A&P

@NathanAndRose 8 лет назад

Interesting fact: while the AB and Rhesus blood groups are the most common blood types for consideration with blood transfusions, there are actually dozens of different blood type groups, that all measure different things. For example, an individual can be AB, D positive, and at the same time M and N positive (MNS system), K positive (Kell system), Le^a or Le^b negative (Lewis system), and so on. ...It took me forever to memorize all of these in school :/ haha -Nathan

@FrozakRL 6 лет назад

Nathan Hutchcraft thanks Nathan haha found this interesting even though I'm commenting late :) hope your doing well

@shivanishastri4285 6 лет назад

Nathan Hutchcraft me too, we were tested on this with so much more! Was this in med school?

@horiadinu8895 4 года назад

I rather pay double my tuition to this guy and his family rather than my professor.. He's getting me through Nursing school, this man needs raise my word

@thelinsey09 5 лет назад

I may be 4 years late saying this... but my curiosity about my low white blood cell count lead me to your videos. Your explanations and visuals really help me understand everything. Thank you so much.

@DuranmanX 8 лет назад

I'm guessing all the dislikes are coming from Crips

@barrymaguire4535 8 лет назад

***** Come on people, that deserves more thumbs up!

@WWZenaDo 8 лет назад

***** Ha, ha, Funnneeeee....

@elstormcaller 8 лет назад

***** Well played

@markvalebcia8750 8 лет назад

I dont get it Crips???disable people

@elstormcaller 8 лет назад

Mark Valebcia No, dude, its the name of a gang, their worst enemy are the bloods, geddit? The haters of the Bloods are the Crips?

@racheljones7339 6 лет назад

CRASH COURSE YOU ARE A SERIOUS LIFE SAVER!! This channel makes anatomy interesting, easy to understand and even fun to learn. Thank you so much, this helps so much in my anatomy class.

@TheCalm25 8 лет назад

I watch every single one of Crash Course's videos, and have for a couple years now. I want to say how absolutely expertly these series' are done. I would never, ever want to listen to anyone tell me about the things I learn on Crash Course. But the hosts of each of the series' have such a critical sense of not sounding arrogant nor condescending. I don't know how the group got together, but it's one of the very rare instances in human kind's history which will remain mysterious as far as how such a truly extraordinary group of people (each absolutely extraordinary and forward thinking in their own personal way, and through their own individual lives) found each other, chose to each make a go of this, and came together in such a cohesive, consistently unique, genuine, and somehow entertainingly knowledgeable way.

@helixentertainment5890 4 года назад

This literally summed up the entire 2nd chapter of my textbook for my Anat Phys 2 class.

@ericacuevas2301 5 лет назад

How did you make this so easy? We've been going over this for weeks and it all makes sense now. THANK YOU! When I'm a pharmacist and not eating ramen I will support crash course forever

@palashgupta3521 8 лет назад

Just one word AWESOME...AWESOME...AWESOME... Plz make videos for Physics and Chemistry as well... Thanks a lot TEAM CRASH COURSE...

@omranhashim1028 8 лет назад

I didn't think I'd learn much because I usually get lost with all the words in biology. But this is actually very well taught. Thank you team Crash Course

@HowToMeetSweet 11 месяцев назад

Crash course is the best channel, if not one of one ! 😮

@meganduckett4372 7 лет назад

This channel helps me so much with my anatomy and physiology tests. Hank goes over a lot of key points that my instructor did, and he explains it a little better to be honest.

@butterlover7592 4 года назад

3:16 like the master sword. You can even see the triforce on it.

@SyedHousein 8 лет назад

The white blood cells carry the Master Sword!

@ria_artsymw1841 7 лет назад

Doctor Syed believe in your strengths, believe...

@justinlansford3910 6 лет назад

There can be only one!!

@bmsenpai8386 5 лет назад

I cracked up when I saw it lmao

@lienia83 7 лет назад

This program is so awesome! Has gotten me through some tough concepts in my Ana, Phy, and Chem classes

@mjay3514 5 лет назад

I am officially a fan ... You've acquired a new subscriber! Thank you for this great information!

@hannahjackson6860 5 лет назад

You are the reason I have a 99% in my anatomy& physiology class right now. Thank you so much for your videos!

@deemon710 8 лет назад

I've heard the different kind of blood types described several times before but I never quite grasped it until this video with it's very helpful visual aids. Thank you.

@iLov3makeupx 7 лет назад

Why am I paying thousands of dollars for a college course when RU-vid teaches better..

@angelofhope7778 6 лет назад

This channel has gotten me 87% on my anatomy physiology exams. Thank you so so much crash course!! My number 1 study tool!

@maryannvictoria4750 4 года назад

Totalmente impactada con la calidad de la informacion, la animacion y la accesibilidad. Gracias a todas las personas que hacen esto posible.

@Vipin-kq5mg 5 лет назад

Thats the cutest WBC I've ever seen! 😁😁😁

@christinevakas92 Год назад

Ah, I'm at the end of my course - thank you so much for all these RU-vids. You and your team have made studying a pleasure, actually had many laughs, and learned so much.

@fortuna19 8 лет назад

I love that little reference to Rapsutin when talking about blood clotting. I'm studying the Russian Revolution

@kaboom138 8 лет назад

Did anyone else notice Rasputin at 6:10 when Hank was talking about hemophilia?

@marinescastellanos6157 7 лет назад

OMG TOTALLY XD

@jerzymajka9460 7 лет назад

I thought exactly the same thing. Has anyone noticed Rasputin and does someone know what he has in common with hemophilia?

@marinescastellanos6157 7 лет назад

Jerzy Majka Hey! So Rasputin was a holy man who became associated with the Russian royal family. The tsarevich, Alexei had hemophilia, so Rasputin was called in to heal the prince. It worked, the prince felt better and so from then on Rasputin became a recurring figure in the royal family, which was VERY controversial at the time. XD

@jerzymajka9460 7 лет назад

Thank you for explanation :)

@marinescastellanos6157 7 лет назад

Jerzy Majka Al No prob 😋

@mohammadmokhtarrashedjibla4742 7 лет назад

thank you for being here for us crash course you really made life much easier for us.

@isabelgallegos6294 5 лет назад

I just love all of these videos! Very informative. Very helpful and well explained. Love it

@iamjacksusername85 8 лет назад

thank you sooooo much for this video. I was having really hard time understanding blood antigens and their relationship with doning blood. This video saved my bacon!

@probablyapossum 8 лет назад

Did that white blood cell have a master sword? I HAVE MASTER SWORDS IN MY BLOOD

@smooshfanultra 8 лет назад

+HeroHeart14z Actually, white blood cells use magic to attack, you idiot.

@PsychoDiesel48 8 лет назад

+XXX_ “SANIC” _XX NO ONE, FUCKS . . . WITH THE WHITE MAGE! XD

@smooshfanultra 8 лет назад

Diesel Marcus What's wrong with black mage? You racist.

@PsychoDiesel48 8 лет назад

XXX_ _XX it was a quote chill XD

@smooshfanultra 8 лет назад

Diesel Marcus That's sexist.

@r.m.a4615 6 лет назад

Thank you . You are making things easier for students and teachers too .

@lavishdabas9549 4 года назад

I visited this channel for the first time and now i can say that it is the *bestest* video i watched today

@rohithr3072 4 года назад

Don't read this you have got a lot of studying to do...

@danpham8963 7 лет назад

The Leukocyte with the Master Sword lol

@scare-a-medic9112 5 лет назад

Seriously these videos are great right before I take a test. Thank you!

@codebluedr 6 лет назад

excellent lecture with just perfect speed , my kind of presentation loved it

@themrkindmanful 7 лет назад

The best man ever and the best show ever...for any student it is a time savier... thus mean MY life savier which end to be ..YOU my real hero. real thanks for you and also for donors thats keep it alive.

@QUICKFACTS247 Год назад

"its just a body" but if you know deeply how the system work.... truly God has put so much effort ❣️🥺

@ellasmith7568 8 лет назад

great video!! just summed up everything I've learnt for my test!!

@ReaperEpisodes 8 лет назад

Always wondered what the blood types meant. Very informative, as always.

@anastaciafrizzell4885 5 лет назад

Lol that leukocyte was holding a master sword 🗡 😂😍

@sameerathreya9253 8 лет назад

"The property of Hank!" Hah!

@shivamnrwl 8 лет назад

CrashCourse is really awesome... Especially the animation part.

@nicolemcdonald9231 4 года назад

Idk what it is but whenever I get sleepy studying all I have to do is look up a Crashcourse video and it wakes me up and gets me pumped to study some more!

@Laske_smash 8 лет назад

I like the fact that the leukocytes has the master sword from The legend of Zelda series

@whisper-hc5vx 4 года назад

When you’re watching in March 2020 where blood drives are shut down because of the coronavirus

@crisharrell 3 года назад

This is bloody awesome as usual. Thanks Crash Course!!! A great big 👍👍’s up!!!!!

@alejandrobugarin9146 4 месяца назад

Thank you, for this video. Very informative.

@nordicrain 5 лет назад

5:07 anone anone

@99thTuesday 8 лет назад

Was that Rasputin over Hank's Shoulder?

@rileydermanuelian7307 4 года назад

Four years too late, but the reason is because the Romanov family hired Rasputin, a holy man, to treat their son Alexei's (the heir of the throne of the Russian Empire) hemophilia. It worked, surprisingly. No one knows what he did exactly (he kept it secret because he wanted a reason to stay close to the family), but it is suspected that he removed something that was making him more ill (can't remember what) from his environment.

@siddharthdasari6598 4 года назад

To add on, the endothelium is the single layer of squamous endothelial cells that line the interior surface of blood vessels and lymphatic vessels. Thank you for the amazing videos Crash Course! Great way to make use of the time I have on my hands right now.

@Boognish2784 7 лет назад

I completely love all of these A&P videos!!! They are really helping me and they are so entertaining!

@JohnSF93 8 лет назад

O- here. been giving blood since I turned 18

@sierraslaugh6071 8 лет назад

Hanks hair tho

@teedtad2534 Год назад

Love videos like this with illustrations! 💵💵🫑💵🫑

@kanoaisgermanzgaming2044 4 года назад

*Hank thanks for information, btw makingvthese videos actually help me in my studies*

@MelissaFlaquer 8 лет назад

8:50 actually the antibodies from the mother attack the baby, not the other way around, in most of the cases. To answer the obvious question of why on the Rh group matters in the case of mother to fetus blood contact it is because the antibodies against ABO antigens do not cross the placenta but Rh antibodies do.

@AmandaLovesOldFords 4 года назад

I scrolled *so far* to find this comment!

@__RD14533 8 лет назад

Brawndo - Its got what plants crave. Its got electrolytes!

@ChrisThomasBone 8 лет назад

OwenBruch22 Water's what they put in toilets and I ain't never seen a plant grow out of a toilet!

@SusanWojcucki 8 лет назад

Electrolytes are just any material that ionizes when dissolved in an ionizing solution (like water)

@bobhope4288 8 лет назад

SubscribeToSyndicate You think Einstein walked around thinking everyone was a bunch of dumb-shits? Now you know why he built that bomb.

@SusanWojcucki 8 лет назад

Bob Hope What?

@__RD14533 8 лет назад

SubscribeToSyndicate They are all quotes from Idiocracy, it's a movie.

@Varaten 8 лет назад

Thanks Crash Course for doing these videos, I like all you guys videos!

@EzloTheKing 8 лет назад

Hank is he best you've helped me with a lot or stuff in my biology class thank you! Your awesome :)

@headpump 4 года назад

"now you're bleeding all over your breakfast.."

@Bankstercide 8 лет назад

"Your blood is the one component of your body that we haven't figured out how to reproduce synthesize or imitate." That's great. It might be more impressive once we've got a better handle on Immunology.

@nyx5939 4 года назад

I think he was talking about the brain there 😂

@4dleons 7 лет назад

I really enjoyed this, thank you.

@amytesch3880 5 лет назад

Ive never watched all the way through the end of any crash course video where he says who wrote the script and who he consulted so basically this whole time I've thought he was the smartest person on earth and knew a ton of random topics in depth

@caribbeanqt16 6 лет назад

I like crash course but I think the host speaks too fast. I'm a slow learner so the rapid speaking kind of confuses me. Other than that, I really do appreciate this crash course :-D

@matthewhardwick365 4 года назад

Playback speed 0.75? Makes Hank sound like he was dropped as a child tho.

@robinclarke8736 4 года назад

Just slow the speed down easy fix, also try professor dave explains!

@Sproklye 7 месяцев назад

is that rasputin in 6:14?

@benjamingiddings4855 4 года назад

absolutely BRILLIANT ! THANKS

@helloshanaynay 8 лет назад

This series has been so helpful to my summer class at Rutgers! Thank you!

@alex-ux3zl 8 лет назад

+Shannsy 95 kik?

@zarnainsrequiem4677 4 года назад

Whos here at 2019?

@rachellanglois5223 4 года назад

yassss

@archeryskills5435 4 года назад

Meeeee

@sitihaurakhairani1121 7 лет назад

definitely my hero for mention true blood haha! such a nice page for learning anatomy and physiology

@xxtreemtv2404 8 лет назад

Thank you...well explained, well understood.Bless!

@draconianking 8 лет назад

O- Master Race reporting in

@cortster12 8 лет назад

Michael Spencer Until you need a transfusion, and then you wish you were AB+.

@thecynic807 8 лет назад

Where did you get this master race shit from

@yeahoh2222 5 лет назад

*yeet in*

@DanThePropMan 8 лет назад

Blood trees would be freaky af... o.O

@sharlaaliza6131 6 лет назад

Thank you so much, this is very helpful

@renuraj1903 4 года назад

The explanation was really good.

@lisabanks1015 8 лет назад

Hank said "flavor" when he was referring to blood type...HA!

@nmmeswey3584 8 лет назад

LAST!!!11!!

@jamesdavies6755 7 лет назад

This guy explains it so well!!! Thanks

@andeemasterson4588 5 лет назад

Crash Course is my favorite!!!! Thank you!

@4001Jester 8 лет назад

Wondering how this is blood part TWO…

@truboo4268 8 лет назад

***** No, because the thumbnail still says 'Part 1'

@animepug8159 5 лет назад

cells at work brought me here

@darrenanimatic9675 4 года назад

No god please no NO NO NNNOOOOOOOOOO

@patriciacruz4105 6 лет назад

Damn. Crash course is much more easier and faster to understand than the 4 hour lectures I have everyday for A&P2.

@Sa.reigh_ 10 месяцев назад

You are the BEST, you r so GOOD🤞🏆and know how to simply things and make it interesting!!!

@Tomyb15 8 лет назад

I've always been bothered by the concept of blood types. What are their real purpose? Because it seems that it only serves to identify foreign red blood cells and destroy them, but what practical purpose does it have? If I being O type receive B type, there is an immune response towards that foreign blood which is harmful to my body. But obviously nature wasn't thinking about blood transfusions when blood types evolved, so maybe if a little of foreign blood enters my body then the reaction isn't harmful (although I don't know in which scenario would this happen). But how would this be useful? I mean that having foreign red blood cells wouldn't be harmful, foreign bacteria and other pathogens would be, but those have their own antigens. So then what? Also it would seem that this system works towards other humans' blood only, since an O type has antibodies for A and B antigens, which would only be present on other people. And having the antigens certainly isn't necessary for our immune system to recognize our red blood cells since O type people live just fine. A final question would be how is it not a problem to transfuse O type blood. The blood contains antibodies for either A or B, so if either of them receive them, those antibodies will attack their red blood cells and should produce an immune response. So what's the deal? Does the immune response not happen or is O type blood always filtered of these antibodies?

@kimfischer7725 8 лет назад

I may be too tired to understand most of what you are asking, but the last question is easy. Type O can donate to A and B because type O lacks any antigens. Antibodies are only present in the serum or plasma and most donations are packed red blood cells. Rarely is whole blood transfused. So in this instance you are only concerned with the antibodies of the recipient vs the antigens of the donor. Type A has B antibodies and Type B has A antibodies but it doesn't matter because there are no antigens on the surface of those red blood cells to react with those antibodies. Same reason type AB is the universal recipient. Since they have A and B antigens, they have NO antibodies, so they have nothing to attack antigens on the surfaces of any blood cell type.

@Tomyb15 8 лет назад

Kim Bishop oh so most of the transfusions done are red cells transfusions. That makes sense because it gets rid of the antibodies problem. Thank you. The rest of my questions were a bit more abstract because they refer to the evolutionary advantage of having different blood types. I've been thinking about it and it may be because it may provide more genetic diversity that could help with diseases, since if a blood type is weaker to a disease, not everyone would be at risk. The problems with transfusions would be more of a side effect. I don't know. If later you can read it again and possibly understand what I said and give me your thoughts, I would greatly appreciate it. :)

@iwanebbing4944 8 лет назад

Kim Bishop Don't forget the Fy(a-b-) in Malaria aswell :-)

@chillsahoy2640 8 лет назад

Ciroluiro From my non-specialist understanding, the blood types are just a chance consequence of the antigen-antibody system. We evolved antigens and antibodies capable of detecting non-native antigens as a way of protecting ourselves from foreign bodies. Once that system was in place, it continued to evolve and diversify into many different kinds of antigens and antibody responses. So it's not so much that blood types evolved as a specific trait, but when we evolved antibodies, some of them happened to be specifically for blood cells, and as a consequence of that we got different blood types.

@kimfischer7725 8 лет назад

***** Yes. I am a college instructor for the Medical Laboratory Technician program.