Circulatory System and the Heart

[108ravinjay]

You had to say "like syrup" didn't you? Ewwww. Strawberry syrup won't be as appetizing now...

[108ravinjay]

You still rock though! It's like a textbook coming to life

[789123Y]

Fantastic video, once again. Thanks to you, i will get to medical school!

[tehalchemymaster]

holy shit this video is so good.......

[mayli74]

my best lecturer ever!! thanks bunches!!



[amaririi]

you rulllllle! best video ever

[IAmTheNietzsche]

"He has eyeballs, and he's looking at us!" haha I love these videos, helpful without being boring, beats the hell out of my biology textbook

[Splinter5k]

we are going through this in A&P II and this video helped me grasp the information better. thanks khan!

[PortugalFootballer]

I <3 you. See what I did there? (;

[shoppittsburghnow]

brilliant video

[jhoenedu]

I am very happy to see the vidoe from you, hopefully the others also are happy for You Introduction to the circulatory system and the heart

[croncong]

I am very happy to see the vidoe after you give this Introduction to the circulatory system and the heart

[fitnesus]

I Love The Video It Can Increase My Knowledge Introduction to the circulatory system and the heart

[lupabuatchannel]

Steady I Really Like This Video Introduction to the circulatory system and the heart

[cenedywong]

Good, I like that you share this video, I wish success always Introduction to the circulatory system and the heart

[Onepissite]

I Really Like The Video From Your Introduction to the circulatory system and the heart

[pemburuiklan]

Your Video Is Very Useful Sharing Introduction to the circulatory system and the heart

[sprattysy]

love the video man

[MrJonkelp]

very interesting video thanks

[Mjhond]

I am very happy to see the vidoe after you give this Introduction to the circulatory system and the heart

[Ondelendo]

I Love The Video It Can Increase My Knowledge Introduction to the circulatory system and the heart

[anakmudajaman]

Steady I Really Like This Video Introduction to the circulatory system and the heart

[bebeheuy]

Good, I like that you share this video, I wish success always Introduction to the circulatory system and the heart

[imegatrone]

Nice Video Introduction to the circulatory system and the heart That You Share , So Very Nice Thanks You

[willamricard]

I Really Like The Video From Your Introduction to the circulatory system and the heart

[bundawartini]

Your Video Is Very Useful Sharing Introduction to the circulatory system and the heart

[distractionxx]

you have some great stuff here

[TheNotoprah]

Love the voice, love the explanations, love the drawings!

[ThaFooooosa]

Guys this guy is amazing! Making biology understandable with a slight touch of humour - He has never timed how long it takes for a blood cell (i think it was) to go all around the body.

SO much better then being stuck in the lab having no idea whats going on

[MalazIbrahim123]

complicated but helpfull

[abckadwa]

Excellent presentation. Thanks!!

[Neylena]

Lool at when he said ''In the left atrium the bud is entering'' at 08.06 and then he laughed xD!

[TheRouterDotNet]

Thanks for all your great vids Sal. I'm a computer guy, not a medical student but I still find your presentations interesting and accessible.

[hungoverjerk]

thumbs up if you like sex!

[howtovideo2011]

Nice info. it's was great to learn about the vital organ of my body.i love my heart

[Alexayzia]

such a good video, thank you!

[rohmaanis]

...oh crap!!!

[tshirtonthehead]

Thanks!



[dannynygin]

excellent explanation!!!!!!!!!!!!!!!!

[mc18601]

Thanks for explaining it so clearly

[Shezwax]

Great skillz,where would be without king Khan.^^

[oOoironhideoOo]

thanks a lot !

[TheTricklisted]

i love this video...haha "look, this guy has eye balls"///awesome video...thank you so much who ever made this

[gaatakek]

@TheTricklisted His name's Salman (often shortened to Sal) Khan. Just letting you know.

[TheTricklisted]

@parsa8000 you still need grammar lessons

[BurntFlower88]

Thank you so much! I wish I had seen your videos when I took Physiology. :(

[selah21740]

So...this is incredibly helpful. Thank you :)

[atlastfq]

Thank you very much, The lyric is very helpful for foreign med-students like me.

[faithyunjae]

Wow this guy is awesome! He's explanations are Wayyy clearer and simpler than my biology teacher's:) bravo

[blah8D]

This video was amazing.

It was like the rosetta stone for body systems.

It's so clear to understand!

[MasSamurai]

this guy..... is the freaken best



[kungfufreak360]

QWOP

[710418oo]

YEAH DUDE HAHA

[joekimusic]

teach mcat!!

[leeyaEFF]

Yeahh its the same thing

[ezbg]

is atrium and auricle the same??

[shailukala]

@ezbg yea same thing n if u wanna go in detail then go for biology books.

[hikerdude4000]

the hell?! what's this about

[shailukala]

@hikerdude4000 wat thing u didnt understand in this video dude?so simple lucid language

[ivan92ivanov]

@Jokuim yes i've wondered the same thing, and according to wikipedia, my books and so on, I'm pretty sure that the blue blood vesels are veins and the red ones are arteries, so @khanacademy , please add notation on the video.

[Jokuim]

isn't it ARTERIES that goes from the pulmonary system to

the left ventreis????

[benja303]

This video is very helpful, but i often lose track of the pointer..

[Anatronica3D]

good video, here is the 3d representation of the circulatory system, i think you will like it! watch?v=jcKoeSPoqUM or go to anatronica(dot)com

[matthedon]

Thanks man great video, really helpful and I understand everything for my end of the year exam tomorrow!!! Thank you so much!!!

[jigleer]

Your vids are great. Cheers bud

[nexychoco]

i thought artery contains oxygenated blood

and veins contains deoxygenated blood....

[0anar0]

@nexychoco and it does except the pulmonary ones. it's because of the size, if you notice the blood vessel that goes to the lungs it's bigger than the one that comes back from the lungs to the heart. So, bigger --> more pressure --> artery.

I think this is the explanation.

[venom827]

Wait why does the heart have 4 pulmenary veins? I mean it only has 2 pulmenary arteries for the 2 Lunghafs, but why 4 pulmenary veins?

[haleysmelody]

who is this guy?! he's amazing! haha

[ema1171224]

The heart pumps blood that carries oxygen around the body. If the heart becomes damaged, it will have difficulty pumping blood.

[Dramin99]

Thx homey

[Jac0b130]

Thanks alot for your help! you go in so much detail, which is really helpful

[Jac0b130]

4 people don't have hearts

[Cheesemine710]

this is hot stuff... ready for the cumulative test... thanks so much!

[ToxicValentine1997]

You know what you should do?

Come to New Zealand, and personally tutor me.

Maybe this way I'll ace my science exams.

[AlwaysSalt]

your good at writing with your cursor

[Kenrox01]

come teach at GK in washington!!

[TheGemsiepoo]

Please move to england and teach me :D <3

[Sidweller]

cool n interestin.. will really help me in my OL's.. tQ.. 10/10

[Sidweller]

cool n interesting.. v gud explanation.. tQ, this will help me in my OLs a lot..

[izzy2imagine]

you're amazing.

[TheNerdyTannator]

4 people don't have hearts.

[ericma000]

"is it a pulmonary artery?? NOOOOOOOOOOOOOOOOOOOOOO!!!" LOLL!! XD 

[4soulman]

Dude you laid it down perfect!

[maccas1329]

i dont know if you realise how much you help bio students around the world. its awesome that someone like you gives time to help others.

[smartgrl2424]

Your videos are unbelievable. Helped me get through so many tough topics in AP Biology. Thank you!

[oceanirons]

Thank you again for creating and sharing these videos! If you are able to and decide to create and share more anatomy tutorial videos oriented to medical and massage professionals we would love and appreciate them too!

[pussycat569]

you are fantastic,it would be great if more teachers had the time to explain properly like you do,you are a great teacher,thanks...

[sedyo100]

@bomberfun1 everyone could be a Doctor as long as you're willing to :)

(Also with a bit of discipline, determination and patience)

[66rthomas]

OMG!!! thank you for these videos. i don't know what i'd do with out you... why didn't i discover you earlier. THANK YOU!

[andalitza]

Thank you for this presentation, it actually helped a lot understanding the mechanics of the cardiovascular system.

[khallidify]

Finally someone that doesn't put me to sleep! Great way to teach and the audio is clear.

[Kronik4ever]

Thank you for this amazing presentation, I learned soo much!

[IsmaVLCM]

You told and teached me everything i needed to know for this system. I love your videos and your demonstrations. THANKS. Keep your good work!!!!!

[Opeth15cool]

I don't understand how the blood flows from the atria to the ventricles.

[nopantsnoproblem1]

fuckin hell man, your so god damm good, your videos make more sense then my Bio teacher keep it up :)

[pushkin138]

how do arteries and veins connect with each other? like what are venules and arterioles i'm confused about those things =/

[jonmonkey15]

great job, can always use extra study material and you make it easy to understand

[review424]

I'm reviewing for the MCAT, so I made a study guide. I thought I'd share with you!

tinyurl

.com

/review424-6

Sorry for the messy url!

[sherbet185]

thank you sooooooo much i have a hard time remembering things in lectures and i easily remember with the way you teach, excellent teacher

[ninjaCUZ101]

this dudeisnt going to fast or too slow i love this thanks dude lol

[ttham11223344]

Your video is excellent.

As I am sick I missed out some lessons in school in Biology. I was looking around and I found your video. Man, you are way better than my teacher. She should watch your videos and learn from them.

Once again thanks.

[CursedDoom1]

Adopt me pleaseee

[emgabrielle]

im almost in love with every single vid you've put up! theyre all fantastic

[lmachads]

your video saved my exam. Seriously my teachers an idiot and doesnt know how to teach this stuff and your video in four minutes explained what he couldnt teach in five months. Thank you so so much!

[runefire84]

dude ur better than my teacher at skool , u just explained this shit in a few min while teahcers at skool kudnt explain to me in a week thnx man

[Khanw000000000t]

Omg !!! Arteries carry oxygenated blood away from the heart and veins carries blood from the tissues towards the heart

[1glicerin1]

this is excelent. NOW I KNOW EVERYTHING!!!!

[JESUSacoustic]

veins are deoxygenated

and artery are oxygenated

you got it mixed up...

[eincinerate88]

@JESUSacoustic veins are centripet and arteries are centrifugue

[soilasalle]

@JESUSacoustic This is wrong. A classic mistake. Much better you think of Arteries taking blood away from the heart and Veins returning blood to the heart. Don't believe me? Consider the Pulmonary artery!

[ajayeire]

@JESUSacoustic no buddy he did not get it mixed up... arteries carry oxygenated blood except pulmonary artery and veins carry deoxygenated blood except pulmonary vein

[sedyo100]

@JESUSacoustic

Pulmonary Artery carries deoxygenated blood then it goes to the lungs to get oxygens so it'd be oxygenated afterwards it goes back to the heart through Pulmonary Vein, that means Pulmonary Vein carries Oxygenated blood.

He said it clearly on this vid. And he didn't get it mixed up.

[gelpoy123]

ILOVE YOU

[freddyr6]

Very good video, are you a doctor?

[LopidoEmeraldFlame]

wow, this is amazing! I am more of an imagry person than a read and memorise person so this is verry helpful! Thank YOU!!!!:)

[grailer123]

genius

[Minjulee2]

What program are you using to draw these diagrams for your videos? Just Curious~

[pilaroka]

This is sooo cool. I am in my first year of nursing and You are a life saver!

[Chantillace]

It's this dude's left hand side!

[Aarhisreshtha]

wow!!!!! u r just great!

[ilikefpsgames1]

thanks man this helped me alot

[CcanCcaglar]

i love you

[beachbarbi77]

umm, so do you do math tutorials? ; )

[shirleyfini]

Thank you for this epiphany! You're an excellent teacher.

[boeing747200lr]

Sal, you did an awesome job explaining human heart. Thank you so much.

[APTX4869L]

YOU ARE SO AWESOME!!! THANKS A LOT!

[love3469]

good explanation..............

[issa5021]

man ur very awesome at this im gonna be a botox surgoen,they put injections on the face and make wrinkles shrink.keep everything up and ull enter a competition,awesome vid!

[stylegal20]

wow!seriously you are the perfect teacher for me.i like your diagrams and your handwriting and you have great detail for colour which i love!the colours you use are very nice and you explain very clearly and funny.i should have seen this earler instead of wasting my whole afternoon trying to see the heart.thanks:)

[gigagroove]

Great vid, great energy, knowledge. Keep it up.

[ash3be]

Great vid!

[n0NcOn4MisT]

Atrium does contract - called Atriole Systole.

Very good Vids & teaching style.

Thanks

[kemiley56]

thank you so much. your videos are a great help. i have an exam soon and i finally understand.

[bennybeibe]

wow its sooo helpful u r amazing

NNNOOOTTTT

[MLCALIBRAPICTURES]

This is a wonderfully explained video. It's easy to remember and I love that you repeat yourself just enough for the student to understand it all as it is a difficult subject and can easily be forgotten. Thank you

[eddik7]

great video man... ;) congrats...

[princessbutterfly786]

ur a great guy....

[MelanholicCarnage]

red blood cell get rid of nucleus to fill it with hemoglobin

[MultiWendy3]

I subscribed.

[briancarey]

KHAAAAAAAAAAAAN!!!!!!!!!!! lol, great stuff man this is easy to understand i thank you!!!

[xxmichoxx]

I wish you had made these a couple of months ago... before I took the MCAT! lol

[returnoftheunicorn]

dude, you should repeat less yourself and take use of better images , the movie is definitly way toooo looong for the stuff it covers

[VisionQuest2012]

WTF??!!!! It's as if it was all designed! That is just way to complex man. How is all that possible? It's mind boggling. You just barely scratched the circulatory system.

[wolverine10mm]

Thanks for sharing.

[Dasmaster1]

try change the mouse's color so its easier to follow when you dont draw a thick line :) nice videos btw love them

[tenshady]

Namaste Sal

Shukruaya, App To Bahoodh Acha Hai.

Wishing you health & happiness

Ten

[MonaRocks09]

@tenshady Namaste is for hindus, he's Muslim. so basically. you fail.

[ajayeire]

@MonaRocks09 it is just a greeting... saying hi or hello does not mean someone has to be a christian.......

[sedyo100]

@MonaRocks09 He's a Muslim? I never knew that!

[artdeco101010]

I always wondered how that worked - thanks !

[norwayte]

Great. It really works... painting/writing and explaining in real time. Otherwise it would be a screen-captured, commented Power-Point-Movie... means a pseudo sophisticated way to explain nothing and distract people from the content with the pseudo-ability to program things and send them into coma - no matter the subject.

Your way to "present" should be spread around the world - from schools to offices to...

Keep on going.

[andreiduffy]

this is very helpful because you don't see a lot of videos about biology on the internet. Actually .. i've never seen biology videos outside of your channel.

[thefragile900]

Thanks