Fetal circulation right before birth | Circulatory system physiology | NCLEX-RN | Khan Academy

Watch how the blood flows through the fetal circulation and compare it to what happens in the baby's body. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai.
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[@khanacademymedicine]

I'm really glad that you have found this video useful. I'm going to keep making these, so keep watching and share with your friends. =)

[@pisces31493]

The smile shows that there are two umbilical arteries and one umbilical vein. Two eyes-arteries, smile-vein. Great video!

[@mariafaltass1308]

Genius! Thank you! :D

[@docfromthesouthbeifong3142]

Or AVA. 2 arteries, 1 vein

[@harendrasolanki4147]

Ofcource

[@kofisarpong4505]

You must be a doctor now😅🔥

[@astrydphoebeward]

This is the best explanation I have ever heard! In Anatomy, we never even discussed the fact about pressure and oxygen! Well done!

[@nameinaframeindy]

I dont even pay attention in Anatomy class anymore. I just come home and watch one of his videos, and I get nothing but 100% on my test. He just makes everything so understandable. Thanks Kahn.

[@Kira13865]

Dude you kick any professor's ass anytime!!

[@emilhavranek9256]

You´re doing a great job, I really appreciate your videos! However I have to point out one big MISTAKE in this video with the blood mixing. I checked out some anatomy and physiology books and this is how it works: So as you said from umbilical vein one part of the blood goes to liver and the other part goes through ductus venosus straight to Inferior Vena Cava (IVC). Here the oxygenated blood from umbilical vein mixes with deoxygenated blood in IVC and in the result the blood is now 67% oxygenated. Now we get to the important part. IVC a SVC (superior vena cava) meet in the right atrium. However the blood does NOT mix in the right atrium (or it does just a little bit) and this is because of the laminar flow of blood (both in IVC and SVC). So from IVC the blood (67% oxygenated) goes through foramen ovale straight to left atrium and eventually to left ventricle and aorta ...and from SVC the blood (deoxygenated) goes to right ventricle, than to pulmonary artery and eventually most of it goes through ductus arteriosus to DESCENDING part of aorta, where it mixes with the 67% oxygenated blood creating 60% oxygenated blood But why is this so important? Brain requires greater amount of oxygen for proper development. And the arteries supplying brain and upper limbs come out of aortic arch before the 67% oxygenated blood (from IVC) mixes in descending part of aorta with deoxygenated blood (from SVC) making the 60% oxygenated blood which goes to lower limbs. I have tried my best to explain it, but if anyone didn´t understand and is interested in this please leave a comment

[@almcc6416]

This is correct. The most oxygenated blood flows preferentially from IVC across the RA via FO to LA and onwards to the brain. less oxygenated blood from SVC flows preferentially to RV -> PA -> DA -> Aorta (beyond the right brachiocephalic artery and left common carotid supply to the brain) and then either to lower limbs or back to the placenta.

[@xx9aznfaith9xx]

Great remark Emil Havranek, just becareful because you said ..."from SVC the blood (deoxygenated) goes to right ventricle, than to pulmonary artery and eventually most of it goes through ductus venosus to DESCENDING part of aorta, where it mixes" but it's ductus arteriosus, not venosus! I'm sure you just had a little slip! I just wanted to point it out for anyone else reading your otherwise very clear explanation :)

[@emilhavranek9256]

xx9aznfaith9xx Thank you! You´re right, I´ve corrected it and now it should be OK :)

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Emil Havranek thank you .... you are amazing

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+Emil Havranek thank you, you're amazing!!

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A very warm Thank you from a very overwhelmed first year medical student here

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Thank you for breaking this material down into simple, understandable pieces. Always in awe of how amazing everything works in A&P!

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I went to like this video, but I guess I had already liked it a couple years ago. This is gold! I love that you explained the resistance; it made everything come together for me :)

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Im doing first year medicine and GOD bless you, you are better than all of my lectures you should have universities and colleges begging you to teach for them :(

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How's med school coming? I'm a Vet, it's so hard not to watch these vidios

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Mohamed Bellahcene lol I have to learn this as well but for high school biology.

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Did you graduate? 🔥

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This is simply amazing!!! You make things so simple....studying for the MCAT...thank you!!!

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I'm a vet, it's amazing how simple yet clever mammals truly work are. Well done with this it's amazing.

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You make Cardiovascular Biology a lot more easy to understand with your clear drawings and explaining every step of the way! thank you! :)

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teacher explained this twice and it took an hour... confused the heck out of everyone.... you do it in 12 minutes.... and aha!!....Got it! Thanks!

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Tania Kirchner its now teachers fault when you are not giving the lecture proper attention??

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Students can learn in different ways, maybe it's easier for students to learn visually with drawings and audio that makes sense with someone who takes the time to really explain.

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I just love your videos! You always explain things perfectly. Thank you!

[@bla69]

I love that I can come to KZbin and clarify things that aren't super clear in class. Thank you.

[@felixetcetera]

Absolutely brilliant! Thanks for making fetal circulation student-friendly :)

[@yashmunjwani8908]

I was so tensed about this topic as I was confused about it but you explained it very amazingly.... thank you

[@mailife4367]

That was beautiful such a thorough explanation, hitting most of not all the important points I needed to know.

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Dear God in Heaven, Thank you for this! Unbelievably helpful!

[@Sapphire093]

Could not have explained this in a better way. Thank you!!!!!

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OMG LOVE YOUR EXPLAINATION! My lecturer's only mentioned briefly and expect us to know most of the stuff. Thank goodness I found this before my finals. :P

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THANK YOU UR AMAZING!! u just saved me hours of studying!

[@rbdsmadmaster]

this is the best explanatory video I've ever watch about the subject. Thank you.

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This was quality thank you

[@yummycandy22]

Couldn't have understood this better from reading several times and getting frustrated. Thankyou so much for making everything so easy. I don't think I'll ever miss out on the details of circulation as explained in this video.

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[@mesunshine3446]

Your video is SO great, really. I mean, the picture of this beautiful simple drawing, but even more is it the first time in a few years that i got the point with the pressure and the foramen ovale. Cool, thank you!

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wow this lecturer is the best. thank you for making me understand.

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thank you.that show was amazing. tried to understand it for so long, now i finaly undesdand it!!

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AMAZING EXPLANATION!!! Thank you!!!!

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[@ardnaxelaprincess19]

i always found teh fetal circulations in parts, this is the BEST explanation . thank you so much

[@rozachikhi5950]

SUPER clear, thank you so much !

[@ItsOverNEINTHOUSAND]

Bless this is so much more simple and easier to grasp compared to lecture and the book

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this was amazing. thank you! My text book was confusing but this really helped me see how this works.

[@anoopshageorge5754]

simple and effective illustration with great explanation . thank you.

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[@janniczke1122]

Thank You for very good explanation!

[@Redr0ses101]

So helpful!! I'm a nursing student and I was so confused about this in class. It makes so much sense now!!

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Loved the explanation! Such a good refresher. Thank you!

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Pure Perfection. Appreciate your work. Thank you.

[@hiliof123]

Finally understood!! Thank you

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I can't believe I've found this video now...THANK YOU SO MUCH! :D

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I'm impressed. Exelent illucidation

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You explain everything so clearly!

[@user-dj7xv1vz1m]

Loved this, very helpful. Can you post the picture though so that we can follow along? Can you do this with future videos too?

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Thank you so much for doing this!!!

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Amazing, you have explained it so well👍

[@snehachandiramani255]

wish they taught us like this in DENTAL SCHOOL! thank you very much :)

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You are helping me so much in medical school!

[@komalraj540]

thanx!it's so easy to understand!!

[@sabithasachu5585]

Thank you so much for your clear explanation

[@jeampierrecruz]

Phenomenal explanation of the fetal circulation, he makes it easy to understand and grasp. Thanks for the awesome video.

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you are amazing !!! :)

[@n.ischiadicus1412]

Thanks for this great video! And also big thanks for the subtitles!

[@shorifdsa]

one of the best way of explanation.... easily memorable ........

[@myjunihond]

Thank you so much... It was very helpful in understanding how the fetal circulation works. Keep up the good work.

[@SuperEiram25]

now i understand it so much... thank you!

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Thank u, you made the topic easy!

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wow this is amazing. thank you so much!

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This helped a lot! Thanks!!

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Great job! Thank you

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Best explanation ever.....even explained why pulm. Vascular resistance is high before birth 🤩🤩

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Thank you so much! Life saver for the MCAT!

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Very very helpful.. thank you!!!

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That was such a great explanation! Very simple yet knowledgable! Thank you :)

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explains well. Thanks you so much!!

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Your explanation and visuals are better then the book I'm reading, thank you!

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