Early embryogenesis - Cleavage, blastulation, gastrulation, and neurulation | MCAT | Khan Academy

Created by Jeff Otjen.

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[mony]

I remember watching this video 2 years ago when i was a pre-med student and now im watching it again as a med student. Very clear explanation. Thank you!

[treshereux]

this kind of video helps a lot for me, freshman of the medical school, when i couldn't understand every single thing by reading that thick-ass langman book. thank you much. keep making videos, khanacademymedicine!

[johnmichael]

I love the fact that u are turning this into a story and making us feel like we are the embryo. It really helps when u spice things up like that. I wish my dry, boring professorr wud watch this video and take notes. Thanks a bunch :)

[aimanrahim]

"Suppose you're an egg cell"
"Here's a mullberry from my yard to prove it"

[maalr]

I cannot stress how amazing this video is, what I could read for hours I understood better in 12 minutes watching this!
Talk about increasing productivity. Thank you.

[manuel]

As far as I know, the zona pellucida does not simply disappear. Instead the blastoceol cavity continues to expand through trophoblasts, which are epithelium, pumping fluid into the cavity. As the cavity grows, so does the tension the blastocyst imposes on the zona pellucida. Eventually the blastocyst pops through the zona pellucida (termed 'hatching').

Source: Medical School Embryology

[VoidHalo]

It's weird to think that this has happened to every single person who lives. Yet it seems like such an alien, unfamiliar process.

[billubiologistbb]

I am a teacher i can explain things quite easily and my wife has recently got admission in a medical college .. guess what .. i am teaching her all her subjects before her classes using khan academy and my teaching skills...RIP her classmates
Those who read my comment till the last word give me a like so that i can be proud of myself lol

[ashcariba]

You explained early embryogenesis in 12 minutes. My professor with over 20 years of experience couldn't explain all this to me in an hour! Thank you!

[gamesneeder]

I wish you would have spoken about the trophoblast differentiating into the cytotrophoblast and the syncytiotrophoblast. But all the same, a very educating video. Thank you.

[Smelly]

Great; but you should've added the days as they are always asking for them!

[clarissajimenez]

I'm a freshman in veterinary school and this is so helpful! Your videos help students of vet med, medicine, physio and everything in between. Amazing job!

[zino-kader]

It never ceases to amaze me how seamlessly you break down just about anything.

[whelanz]

So what I've learned here...is either you were hungry and had food on the mind when voicing over this, or embryos are just very food-like. We got mulberries, melons, pancakes, syrup, and then I was reminded a bit of a burger and a hot dog.

[againstas]

It's actually incredible how simply you explained this! My lecturers made such a hack job of it, confusing everyone!

[shreyasabberwal]

Fantastic video! I'm a 1st Year UK Med student who was very confused after Embryology lectures- but this really cleared things up... Thank you!

[morezco]

I got scared when I realized I wasn't subbed yet
I wonder why they separate this from the main Khan Academy channel. Great classes! 🙂

[SirPigeonTheKnight]

You are better than my university at explaining this!!!!

[yunogasai]

I just got a whole lot of information that lasted for 12 minutes, that may be equivalent to a whole book chapter.

[Tallowah]

This video was absolutely amazing. I have been reading my textbook and watching other videos and still didn't get a full understanding as to how the process works. You broke down quite effortlessly and in a manner that even my 6yr old son could understand. Thanks so much for sharing. Please continue to make more videos. I sincerely appreciate them.