Stages of Animal Development: Cleavage, Gastrulation, Organogenesis

can say the difference between gastrula and embryonic disc .and also between stem cellsand germ cells

professor dave, im a grade 12 student who has taken biology, im currently studying human embryo developement, my textbook says that after implantation, the ectoderm and endoderm form first then the mesoderm appears afterwards, my teacher claims that this is incorrect and the endoderm forms first by the morphogenetic movements of the cells of the epiblast to replace the cells of the hypoblast and when i search it up on the internet, almost all sources agree that the ectoderm forms first, then the mesoderm and the endoderm forms last, i am really confused please help

(i also asked chatgpt, at first it agreed with the internet, then i brought up the mechanism my teacher explained, and it changed its answer to saying that all three layers form simultaneously 😂😂😂, i guess ais cannot replace human teachers anytime soon)

Thankyou Dave as always

OMG I can't Tell how much of a treasure you are. Yes sir! I'm shaking rn

I love you papa Dave, you're the best.

discovered this channel when i was a junior in high school and i still go here for extra learning now as a sophomore in college <3 we love u professor dave

Do cool

Pls do a video on embryology 🙏

Love this, thank you, Pr. Dave!

Gastrulation? More like "Gee, I feel elation" whenever I watch one of your videos. Thanks again so much for making and sharing all of them!

Dude, where are your religion videos? I think i can remember you even attended a livestream with some guy.

YOUR SO COOL

Since you brought up anatomical positions,does the butt of a human lie in the ventral or posterior end? Most people refer it as posterior but people stand up straight which would give our butts at the ventral side and not posterior side.

Just curious but what’s ur IQ

Hey dave, it'll be really fun seeing u react to a video called "the history of the entire world, i guess"

dave he did it globebusters actually posted a lunar eclipse video. ive just watched it and i dont really see how its proving everything that was supposed to be redeemed and i feel like you could IF YOU WANTED TO and no im not trying to be like oh hey you need to go do this you knoe but only if you want to now go do it, but actually thinking about if you really want to spend another second of your time on a lost cause like flat earth
long story short you can make content out of globebusters

Hay just though of this. Ask the flat earth crowd to explain this. The Arora borealis, this happens do to the solar wind pausing over the magnetosphere crating a natural friction and discharge in the earths atmosphere resulting in that strange glow only found in north and south poles. That strange glow dose shift a bit north and south from time to time but stays mainly in the north and south pole. Having said that this is my point. If the earth was FLAT, this natural friction and discharge in the earths atmosphere with the glow, would be in a different place but its not; this magnetosphere " magnetic field " is also spherical. Tell these primitives to explain this.

Prof. Dave, i have a question...are scientists (or cosmologists?) sure about the age of our universe or is it "13.8B or more" type?

And can u make a video on why this kid is wrong? I would appriciate it...anyway this is the title of the video: GOD exists (Stephan theory proved wrong) by a kid!

So iv been doing my best to read articles on the comparison and comparability between budhism and science I’m not saying they are or are not I’m not well educated I either budhism or science to answer that’s why I want to gather opinions and ideas

So I want to see if there are any underlying conflicts between the relgion and science and if there’s ways to avoid (malicious Versions of) religious marketing like..idk I’m trying hard to think constructively and critquely but I’m young and usualy tried idk if you can answer this or give any insight Dave it’s fine if you don’t I just am trying to stay scientific but also stay within my relgion healthly

Not to be confused with Oregano-genesis, which is a necessary step in making pizzas.

Hey Professor Dave. Last year was one of the worst years ever in my entire educational life. I was pulled deeper into the chains of depression due to academic failure as the year went on. This continued until I had to drop 2 of my AP classes (Currently a HS Junior). I would just like to thank you for helping me bring my way back up to be on-par if not exceedingly past the expectations of my age.

How can you have nearly 2,000,000 subscribers but only get like 10-20k views per video? It's crazy.

Thank you Jesus of PHYSICS & CHEMISTRY 🙏

I came for the annihilation of the globe busters but I stayed for excellent science content like this. Love the channel Dave!

Dave, you need way, way, WAY more appreciation from the internet. Thousands of students like me flock to your channel for assistance/clarification in every walk of education and science everyday, and I am appalled that the majority don't make sure you feel appreciated. Keep being awesome!

Interesting science stuff, Dave!

Thought it was gonna be a professor dave furry arc for a second but thankfully it wasn't that kind of cleavage

Sir,
Have you explored debunking steven greer and his alien non-sense?

Great information.

Hi. You sh do one about what a society is. Like how and why are we in this situation and we decide to go forward and continue or make changes. What is society.

Your videos safe me

I liked it when your hair was longer. Otherwise, this was an excellent embryology primer.

"Cleavage" huh? :)

I've alway found it ironic how we humans refer to what's become known and accepted as the lower form of animals but at the same time, can't fathom that humans are animal. And that the only thing that I have come to the conclusion that separated humans from the suppose lower form is the fact that only humans not only have a concern but an obsession with purpose. Without it, humans can't fathom our existence. It's ironic how the one thing that separates our existence from any and all other life forms, purpose is the one thing that will cause it to end.

thank u for the high level science mr. science man. love this channel

I came to see the cleavage and was sadly disappointed tbh....👍

Thank you chemistry Jesus 💙

Thank you.

Superb

Objection your honor! Not ALL animals require a sperm cell fertilizing an egg cell. After all, parthenogenesis is a mechanism of procreation observed in multiple species of invertebrates and vertebrates. On top of that polyps can generate new polyps via budding.

A bit of a click bait title as there’s no cleavage in sight. But interesting nonetheless.😋

If the earth isn't flat how come we don't have globe monitors? take that you globehead! also thanks for the new video this is really cool m8

Remember 2 years ago when you promised (on ask Dave number 5) that you will do a political science playlist ya… you haven’t done it
And I am waiting for you to do it.

Just in time for my students' Introduction to Biology course. Can't wait for the next ones in the series. Thank you, Professor Dave.

This looks to be as educational as AronRa's phylogeney series, but with a little different perspective. Very interesting!

this was really coooool prof! you rule thanks for making us all smarter for free <3

I read title: Orgasm Genesis.

I look at thumbnail: a vagina.

Conclusion: I need a therapist.

Cleavage lol