Early embryogenesis - Cleavage, blastulation, gastrulation, and neurulation | MCAT | Khan Academy
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- Опубликовано: 7 фев 2025
- Created by Jeff Otjen.
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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!
Same here. Just started this week xD
@@XxJaguar22 good luck on ur journey
Me too!!!
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!
good for u! btw can i be your friend bro?
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 :)
LOL @ DRY BORING PROFESSOR
IT IS A MOTHER FUCKING STORY.
Especially since we've all been through this, literally
Oi7
@@windywendiomg true
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!
Sef Sefa i hate langman he keeps making new name of every step 😤
Also had to watch this over Langman, great video though, feel more ready for my microscopic anatomy exam in 10 hours haha
Yep "new names for" Prenotochordal cells .. wtf...
not as thickass as KLM the developing human
guys, in your opinions is KLM better or langman? what do you think?
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.
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!
"Suppose you're an egg cell"
"Here's a mullberry from my yard to prove it"
You Look like a melon
And a PanCake
And a pancake with caramel syrup
it made me so happy when he said "here's a mulberry from my yard"
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
+Manuel Armas Yes...The conceptus "hatches" as a blatocyst from the zona pellucida.
yep that's waht happens...was wondering the same thing and there's a lot of detials left behind
THANKS A LOTT
It's weird to think that this has happened to every single person who lives. Yet it seems like such an alien, unfamiliar process.
agree!! that is one of a reason why the birth is miracle.
@@mariesatow1339 You've never seen an actual delivery have you ?
@@ShoubhitPA2004 not yet. I long for the day when I become a doctor and see it :)
Not only person, it happen to any animal too, same process
That is why zoology and human are surprising subject and organisms respectively 🙂
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!
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.
It never ceases to amaze me how seamlessly you break down just about anything.
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.
They talk about this in the next video on implantation. ruclips.net/video/1KL8HAm3uSY/видео.html
there's another video for that part
This video is so much better than the sleep-inducing 2 hours of embryology I had to suffer under my anatomy teacher.
Which university r u from ? Cuz I swear i live the exact same thing :)
@@tindykaya Gulf Medical University
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
It's actually incredible how simply you explained this! My lecturers made such a hack job of it, confusing everyone!
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! 🙂
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)
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!
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. ❤❤❤
we need professors like this! not someone who only gives books and let the damn students read everything in it...
I just got a whole lot of information that lasted for 12 minutes, that may be equivalent to a whole book chapter.
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..
As a medical extern,i abslolutely forgot about the embryogenesis and this video helped me out alot. Keep making videos and make better doctors
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.
You are better than my university at explaining this!!!!
Clearly understood 😊
Great; but you should've added the days as they are always asking for them!
Yes
@ابو ليث الخطيب Haibibi salam alaikum yamete kudasai brother
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
This was the best khan academy vid i've watched so far in any subject. this guy deserves a raise
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 :(
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
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.
+James Caines, some sources will say that the endoderm is derived from the hypoblast. It depends on the textbook/source you refer to
+James Caines 32 cell stage is morula
You're probably right. Med school is generally wrong.
yup my textbook says hypoblast forms amnion (12th grade)
@@DRARANASForTheWellBeing, it's 16: en.wikipedia.org/wiki/Morula
Hundred of hours in school vs 12 minutes.
Now I fully understand these stages. Thank you Khan!
Thanks to you also Doc J!
Your explanation was so much better than those from the books I've read you deserve the strongest hug ever
I wish we have professors like you.
When somebody tell you perfection doesn’t exist, show them this video.
Life per se is perfect 💕
So simple yet everything is explained. You saved me a lot of time with this lecture. Thank you good sir :)
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 :)
You made something quite complex into a very simple succession of steps. I might pass my Master exam thanks to you!
This is ever best biology lacture in my whole life. Delivered very simply but in a comprehensive way. Thank for uploading. Its really helpful
“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)
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.
I was soooo lost but now I see light at the end of the tunnel. .thnks man you are the best.....
My textbook just had to make this difficult. khan academy medicine I owe you my biology grade.
thank you so much, it wasvery useful to see whole picture and helped me to navigate better what happens in this complicated issue
I’m shook. This was incredibly well taught.
you guys learning this in medical school? why am i learning this in high school wtf.
Which are you from?
@@Explained_science pre-med
thanks, useful for my medical exam
its a great video but i think you would have added more fresh by mentioning specific weeks for each change
Thanku so much sir.
Explained very nicely..no one will dare forget this after watching this video.:)
makes sense this guy is a radiologist lol, this is a stellar explanation. bravo!
The language complements the visualization and vice versa. That's how it should be. Not many can do that.
how is it possible that I learn so much quicker and better online on RUclips, 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?
better than my med school lecturer!
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
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.
would be useful to have a time line attached to this
Do we understand the microbiological mechanisms that orchestrate this amazing process?
Life-saving video.. I was litterally amazed to how well this was explained (sry for my english)
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 :)
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
What this lesson is missing is matching every step to the time (day) of it happening.
The way you explain it is so amazing.... It's fun to study❤️
Fantastic video. Other people use terms such as "invagination" and here you are talking pancakes. Really simplifies, relates and helps understand. Cheers again.
Baik pak , terimakasih pak
Yall are great but shoulda mentioned about the cells of rauber and indeterminate anf determinate stages of the morula
For sure the best explanation ever. Congrats. Your are super hiper didactic.
thanks for the video it had given us an headache with my friends during our discussion,,,,,,,,
God bless you
Amazing video. Easy to understand and straight to point
I love how he assumes we are an embryo because come on, we've all been through this.
Best lecture ever thank you so much
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😰🤕🤕
you can take my medical degree man
Zona Pelucida disintegration: "You can't be stuck in this thing forever" LMAO......
Where is the information stored which tells these cells how to divide and aggregate? It can't be in DNA, since it only codes for amino acid production.
You should use the standard colors for germ layers!
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.
I learning a new thing
I have not watched video by Jeff before, love his way of explaining things tho! Thank you so much!
So unbelievably helpful! Thank you so much!
omg ...you made it super easy to memorize.....love
Thank you very much for your brilliant illustration!!! Complex theory simplified!!
The time course would've been nice to see, as well.
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...
Khan is an honorary title though.
WHY WON'T MY CLASSES BE LIKE THIS
Thank you teacher ❤
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.
Thanks for this brief effective explanation ! 👏🏻
Brilliant! Best explanation on RUclips!
Thank you for making this process easy to understand!
AWESOME . loved it, made the concepts very clear. good work !
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 :)
lollll I am doing physiotherapy course yet I still have to learn this
Really, do yourself and your unfortunate patients a favour, get out of medicine.
😂😂😂😂😂
@@Kencan254 Chill mate
@@AqsaFatimaMQA I'm doing occupational therapy and I need to know it as well, lol.
Amazing
chefs kiss explanation AMAZING
Excellent ! really love to watch the stuff you put on
Zona pellucida doesn't disintegrate.
Due to the pressure developed by growing blastocoel a slit is produced in it and blastocyst squeezes out through it.
During this process it may split into two forming monozygotic/ identical twins.
11:25 recap
best video ever. thanks
this is the best video i have ever seen.Thank you very mych,keep doing this amazing job!
We are excellent at giving everything impressive names and we can follow what is happening but we have no clue of how and why these incredible things happens.It’s similar to space we give impressive names to stars, planets, galaxies, but we have no clue of it’s size, it’s purpose,or what it is or where it goes or how it all got there.