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

[@m0ony1]

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!

[@XxJaguar22]

Same here. Just started this week xD

[@m0ony1]

@@XxJaguar22 good luck on ur journey

[@akirak.8742]

Me too!!!

[@leona17913]

I am a pre med student and I am also planning to do med I hope I'll be back here as well Congratulations on your journey!

[@36yohannanainggolan45]

good for u! btw can i be your friend bro?

[@johnmichael5135]

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 :)

[@danyellesod]

LOL @ DRY BORING PROFESSOR

[@abouttocum]

IT IS A MOTHER FUCKING STORY.

[@windywendi]

Especially since we've all been through this, literally

[@leticiagerberalmeida3360]

Oi7

[@Lovely-bh3ln]

@@windywendiomg true

[@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 sooooo much. keep making videos, khanacademymedicine!

[@gohna546]

Sef Sefa i hate langman he keeps making new name of every step 😤

[@Frederik95Kirk]

Also had to watch this over Langman, great video though, feel more ready for my microscopic anatomy exam in 10 hours haha

[@croin6020]

Yep "new names for" Prenotochordal cells .. wtf...

[@maryamaftab4580]

not as thickass as KLM the developing human

[@asmahaque8558]

guys, in your opinions is KLM better or langman? what do you think?

[@maalr4466]

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.

[@aimanrahim7300]

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

[@xenoy-littlebigsnake2564]

You Look like a melon And a PanCake And a pancake with caramel syrup

[@monav2686]

it made me so happy when he said "here's a mulberry from my yard"

[@manuel3812]

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

[@DStrick2008]

+Manuel Armas Yes...The conceptus "hatches" as a blatocyst from the zona pellucida.

[@merhoumrayane3400]

yep that's waht happens...was wondering the same thing and there's a lot of detials left behind

[@elitegaming4262]

THANKS A LOTT

[@Mrsbhuiyan26]

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!

[@clarissajimenez4108]

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.

[@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.

[@_becca_beeboo]

They talk about this in the next video on implantation. kzbin.info/www/bejne/Z3yvaXt3opioibs

[@heisnamsanathoisingh]

there's another video for that part

[@Smelly13]

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

[@drintrovertofficial]

Yes

[@lbp7693]

@ابو ليث الخطيب Haibibi salam alaikum yamete kudasai brother

[@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.

[@mariesatow1339]

agree!! that is one of a reason why the birth is miracle.

[@ShoubhitPA2004]

@@mariesatow1339 You've never seen an actual delivery have you ?

[@mariesatow1339]

@@ShoubhitPA2004 not yet. I long for the day when I become a doctor and see it :)

[@NurseVale33]

Not only person, it happen to any animal too, same process

[@amsmile-ju9km]

That is why zoology and human are surprising subject and organisms respectively 🙂

[@whelanz3]

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!

[@SirPigeonTheKnight]

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

[@임준서-z9x]

Amazing...developmental biology can't get any easier than this bb Apparently I wasn't the only one dissatisfied with my lectures(I'm a pre-med student)

[@shreyasabberwal8950]

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!

[@AqsaFatimaMQA]

This video is so much better than the sleep-inducing 2 hours of embryology I had to suffer under my anatomy teacher.

[@tindykaya]

Which university r u from ? Cuz I swear i live the exact same thing :)

[@AqsaFatimaMQA]

@@tindykaya Gulf Medical University

[@Tallowah21]

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.

[@jonathanhess4830]

I can't thank you enough for saving my exam, I am watching this at 2:30 am in the morning and have a test tommorow, i can feel my stress just going away

[@bmsampa6385]

Thank you so much this video as a new health student has helped me where I couldn't understand from my lecturer, this video has made me understand..

[@fardinhamidi8037]

This is one of the best lessons I`ve ever gotten, very good explanation with some strong ways to memorize the whole system keep doing what you´re doing

[@cortexset]

As a medical extern,i abslolutely forgot about the embryogenesis and this video helped me out alot. Keep making videos and make better doctors

[@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! 🙂

[@mahmoodabdelkader9509]

This was the best khan academy vid i've watched so far in any subject. this guy deserves a raise

[@guillermopoli8349]

Your explanation was so much better than those from the books I've read you deserve the strongest hug ever

[@karlocavlina3399]

So simple yet everything is explained. You saved me a lot of time with this lecture. Thank you good sir :)

[@tipsandtricks8524]

we need professors like this! not someone who only gives books and let the damn students read everything in it...

[@Eleven_20]

I remember watching this video as an undergraduate, now I teach embryology and I’ve come back to watch this video and I’m sure my students would love my explanations and teaching stemming from this video. ❤❤❤

[@agnestee4261]

Thank you so much for this video!! I'm in my first year of medical school, and I can't understand a thing in the textbook :(

[@syedaqeel8819]

I wish we have professors like you.

[@jamescaines8356]

The morula stage has 16 cells and the zona still on it... Also all three layers of the tri laminar disk are derived from the epiblast diving in at the primitive streak. The hypoblast is completely obliterated. That point is important but wasnt made.

[@zachnygren6573]

+James Caines, some sources will say that the endoderm is derived from the hypoblast. It depends on the textbook/source you refer to

[@DRARANASForTheWellBeing]

+James Caines 32 cell stage is morula

[@jamescaines8356]

You're probably right. Med school is generally wrong.

[@shanthala1345]

yup my textbook says hypoblast forms amnion (12th grade)

[@ArranRWilliamson]

@@DRARANASForTheWellBeing, it's 16: en.wikipedia.org/wiki/Morula

[@bestvideos1897]

This is ever best biology lacture in my whole life. Delivered very simply but in a comprehensive way. Thank for uploading. Its really helpful

[@mohammed21aa]

very good video, can you do me a favour and make video on how to go back in time so I can choose a course other than medicine. Thanks :)

[@AqsaFatimaMQA]

lollll I am doing physiotherapy course yet I still have to learn this

[@Kencan254]

Really, do yourself and your unfortunate patients a favour, get out of medicine.

[@dr.s.choudhury8089]

😂😂😂😂😂

[@katy3901]

@@Kencan254 Chill mate

[@emihlegqola]

@@AqsaFatimaMQA I'm doing occupational therapy and I need to know it as well, lol.

[@kingophir4561]

Hundred of hours in school vs 12 minutes. Now I fully understand these stages. Thank you Khan! Thanks to you also Doc J!

[@emihlegqola]

This video was so helpful!! I'm writing my final exam tomorrow and it's a really really good video to use to revise. You explain so well!! Thank youuuuuuuu :)

[@yvainec]

thank you so much, it wasvery useful to see whole picture and helped me to navigate better what happens in this complicated issue

[@BERRA647]

You made something quite complex into a very simple succession of steps. I might pass my Master exam thanks to you!

[@yunogasai4183]

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

[@NurseVale33]

When somebody tell you perfection doesn’t exist, show them this video. Life per se is perfect 💕

[@shaes.204]

I’m shook. This was incredibly well taught.

[@LuckysSanga]

Clearly understood 😊

[@bargdaffy1535]

Zona Pelucida disintegration: "You can't be stuck in this thing forever" LMAO......

[@gocrazy9955]

Thanku so much sir. Explained very nicely..no one will dare forget this after watching this video.:)

[@queen34567]

I was soooo lost but now I see light at the end of the tunnel. .thnks man you are the best.....

[@xi-caizahasim9095]

My textbook just had to make this difficult. khan academy medicine I owe you my biology grade.

[@studiolive5697]

“We created man from an extract of clay. Then We made him as a drop in a place of settlement, firmly fixed. Then We made the drop into an alaqah (leech, suspended thing, and blood clot), then We made the alaqah into a mudghah (chewed substance)…” (Quran 23:12-14)

[@lara9149]

Life-saving video.. I was litterally amazed to how well this was explained (sry for my english)

[@yaserameen7684]

Thank you very much for your brilliant illustration!!! Complex theory simplified!!

[@mattonxia1392]

8:12 . It might be a bit deceiving since the hypoblast (Yellow) is the same color as the endoderm. The epiblast is responsible for all three germ layers

[@anteportasbonn]

The language complements the visualization and vice versa. That's how it should be. Not many can do that.

[@bargdaffy1535]

The funny thing about Embryology is you don't even know what you are learning until you are done with the classes and tests....weirdest class I ever had and the Professor was just as strange. You are literally sitting in class next to your friends and saying what the hell is this, and they say I don't know but I guess we are supposed to learn it.

[@liabevilaqua3508]

For sure the best explanation ever. Congrats. Your are super hiper didactic.

[@HARU.7243]

The way you explain it is so amazing.... It's fun to study❤️

[@uzaira9089]

Fantastic video. Other people use terms such as "invagination" and here you are talking pancakes. Really simplifies, relates and helps understand. Cheers again.

[@Min2073]

Thank you for making this process easy to understand!

[@ritobratochatterjee7358]

AWESOME . loved it, made the concepts very clear. good work !

[@collinssian9532]

thanks for the video it had given us an headache with my friends during our discussion,,,,,,,, God bless you

[@norway5708]

thanks, useful for my medical exam

[@Katan212]

Hey, really helpful video however, if you could add a note that hypoblast doesn't give rise to endoderm at around 8th minute that'd be grand, you never say it does but the colours might make someone get it wrong :)

[@frenceywilson3314]

Great video with a complicated concept simplified!!Good information.Thanks Sir.

[@sumnerjones8588]

makes sense this guy is a radiologist lol, this is a stellar explanation. bravo!

[@Gusburg]

better than my med school lecturer!

[@kayleeguimont3567]

I have not watched video by Jeff before, love his way of explaining things tho! Thank you so much!

[@ShioRynnie]

Amazing explanation, really rasy to understand. thank you!

[@matshum6592]

its a great video but i think you would have added more fresh by mentioning specific weeks for each change

[@chinerommamel2862]

Amazing video. Easy to understand and straight to point

[@booJay]

Note to self: start watching at 11:22

[@mernaelnosiry9672]

Thanks for this brief effective explanation ! 👏🏻

[@ΕλίναΤσινού]

this is the best video i have ever seen.Thank you very mych,keep doing this amazing job!

[@xoooxthanks6957]

What this lesson is missing is matching every step to the time (day) of it happening.

[@Keikora]

WHY WON'T MY CLASSES BE LIKE THIS

[@adeelsaleem4242]

I have one question. When does the blastoppore forms. As in general, we differentiated between dueterosome and protosome on the basis of the fate of blastopore. Is it during the mesoderm formation or what? I am confused with that. Please reply and thanks in advance !

[@Dani_king_here]

omg ...you made it super easy to memorize.....love

[@KillerTacos54]

So unbelievably helpful! Thank you so much!

[@Peekaboo-Kitty]

Brilliant! Best explanation on KZbin!

[@tariqmuhammad3012]

The time course would've been nice to see, as well.

[@husna6797]

amazing?? so easily understandable thank you so much!!

[@cuiminmayo8646]

Excellent ! really love to watch the stuff you put on

[@apollo7782]

Best lecture ever thank you so much

[@ahmaddude1423]

So i was cramming my biology course...and it went from gametogenesis all the way to development and aging..and .everything in between,... AND DAMN THE EXISTENTIAL CRISIS IT GAVE ME😰🤕🤕

[@Agnithos]

very amazing video , but the new discoveries prooved that the bilamenar disk is wrong as the hypoblast isn't part of the embryo formation and it isn't the origin of the endoderm

[@dr.purnatamanohar1099]

just awesome.....best vid for last minute revision...thanks a lot.. keep up...

[@TheAIEpiphany]

Do we understand the microbiological mechanisms that orchestrate this amazing process?

[@DP-sb3kg]

The endodermal layer does not arise from the hypoblast cells, it is from the differentiation and migration of the epiblast cells. The hypoblast actually forms the yolk sac cavity and are not part of the embryo.

[@virajj4737]

Thankyou for the video, sir.🙏🏻

[@docsafi7749]

KHAN, the name which was used to be used for illiterate people... Luckily, we have some great Khans like you who only will to serve the humanity. wish you you more and more health and wealth to keep serving the humanity. PROUD TO BE A KHAN...

[@syeddentals]

Khan is an honorary title though.

[@فكربعقولالعباقره]

thanks a lot Embryology is the discipline concerned with the study of embryogenesis, the development of the embryo from a fertilised egg cell. Findings in embryology have helped in the understanding of congenital abnormalities and developing assisted reproduction procedures.

[@nurulistic]

chefs kiss explanation AMAZING

[@yelly11]

how is it possible that I learn so much quicker and better online on KZbin, on a language that isn't even my first language, without flashy equipment and without teacher beside me to answer all of my questions? why are schools so bad at their job?

[@connoroneill-dee1248]

You should use the standard colors for germ layers!

[@windywendi]

I love how he assumes we are an embryo because come on, we've all been through this.

[@morganzachlfich4309]

you guys learning this in medical school? why am i learning this in high school wtf.

[@Explained_science]

Which are you from?

[@morganzachlfich4309]

@@Explained_science pre-med

[@luckydesilva6733]

Thank you for explaining sooo nicely. With respect X X

[@rajattiwari6076]

Great video sir.....Finally all my conceptsr egarding thid topic got clear. And please elaborate on formation of monozygotic twins.

[@zaksong7649]

Concepts explained very straightforward but the video is a bit oversimplified. Lots of important detail missing. Also the colouring is confusing, eg it makes people think that Hypoblast give rise to endoderm.

[@mediatoroga4846]

I learning a new thing

[@Olabeu]

best video ever. thanks

[@billubiologistbb9191]

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

[@jasminebavington7663]

would be useful to have a time line attached to this