Few things to note that were omitted in this lecture: 1. Many primordial follicles, and therefore primary follicles are recruited (NOT just one). All of the follicles undergo atresia except one dominant (pre-ovulatory) follicle which is ovulated. 2. Zygote does not implant in the endometrium. The zygote undergoes cell division and morphological changes in the fallopian tube to become morula and then finally a blastocyst. The blastocyst implants into the endometrium. 3. Upon fertilisation, you get a second polar body. In contrast to the first polar body which is basically functionless, the second one has an important function. The second polar body determines the axis of the first division from zygote to 2-cell stage. Apart from these omissions (which are sometimes necessary for the interest of time and simplicity), a great explanation! Thanks.
This is very true. The zygote starts to cleave in the Ampulla of the fallopian tube. It is not until days later that the blastocyst becomes implanted in the endometrium. But for the understanding of oogenesis that information is kind of redundant. As long as the info up until the graafian follicle ruptures is precise (which it is) then those wanting to understand oogenesis will subsequently have done so after watching this video.
What happens with centrosomes? Do they disappear in the process? How does meiosis end if there are no centrosomes? Does that mean that human(mamalian?)cells can potentially reproduce even in the absence of centrosomes?
Thank u so very much... your way of explaining topics is really great !!! you explain everything in minimum time possible where as other video channels have very very long duration videos which is annoying ... thanku
thank you but there is no secondary oocyte in secondary follicles as I know. Secondary oocytes only appear in tertiary follicles about 2 or 3 hours before ovulation. would you please explain
Secondary oocytes can only be seen or are present a couple of hours before ovulation/release of mature ovum from the ovary thus the secondary follicles still actually contain primary oocytes
hi, well correct me if I'm wrong but the oocyte remains primary until tertiary (Graffian) follicle ruptures, once the oocyte is released it becomes secondary. Other than that, very helpful diagrams thanks a lot
Some other important things are missing. Including the processes that lead to the transformation of a primordial follicle into an ovarian graafian follicle that has granulosa cells, how does it happen?. Also how the zona pellucidar is formed, that part is missing.
Wow! This video was awesome. I was struggling with understanding oogenesis in my physiology course. But your video helped me to fully understand the process
I am having a bit of predicament. Is it that primary oocyte remain arrested at prophase I until ovulation? So I assume that the primary and secondary follicle contains the primary oocyte until ovulation when primary oocyte complete meiosis I and become secondary oocyte. But in your video you mentioned that secondary follicle contains the secondary oocyte. May I ask did I misunderstood anything?
You are helping me so much studying for the MCAT! Thank you for your perfect explanations ❤️
Uh! I cannot thank you enough for always building my mind maps for me! You are a lifesaver.
Thank you so very much
Thanks for the video
It's also helping the Indian students like me
Great job
Keep it up 👌❤
Few things to note that were omitted in this lecture:
1. Many primordial follicles, and therefore primary follicles are recruited (NOT just one). All of the follicles undergo atresia except one dominant (pre-ovulatory) follicle which is ovulated.
2. Zygote does not implant in the endometrium. The zygote undergoes cell division and morphological changes in the fallopian tube to become morula and then finally a blastocyst. The blastocyst implants into the endometrium.
3. Upon fertilisation, you get a second polar body. In contrast to the first polar body which is basically functionless, the second one has an important function. The second polar body determines the axis of the first division from zygote to 2-cell stage.
Apart from these omissions (which are sometimes necessary for the interest of time and simplicity), a great explanation! Thanks.
This is very true. The zygote starts to cleave in the Ampulla of the fallopian tube. It is not until days later that the blastocyst becomes implanted in the endometrium. But for the understanding of oogenesis that information is kind of redundant. As long as the info up until the graafian follicle ruptures is precise (which it is) then those wanting to understand oogenesis will subsequently have done so after watching this video.
What happens with centrosomes? Do they disappear in the process? How does meiosis end if there are no centrosomes? Does that mean that human(mamalian?)cells can potentially reproduce even in the absence of centrosomes?
Your videos have helped a ton with my mcat studying!! Thanks very much
Thank u so very much... your way of explaining topics is really great !!! you explain everything in minimum time possible where as other video channels have very very long duration videos which is annoying ... thanku
I think no one will explain like this ❤️
Ak you are the best
You are an amazing teacher
you are my number one, what would I do without you!!
thank you so much all your videos helping me a lot
Excellent video- well done! You're on fire! :)
One of the best lecturer in the world😊
Thanks for making it easier to understand🖒😇
100% great video
It's so good to understand
Thank a lot
Very well explained sir.......I just love the way you teach and also understood it very well ....thanks a lot for your efforts .....☺️☺️☺️☺️
thank you but
there is no secondary oocyte in secondary follicles as I know.
Secondary oocytes only appear in tertiary follicles about 2 or 3 hours before ovulation.
would you please explain
Thanks AK.
shaikh zoya you're welcome :)
Secondary oocytes can only be seen or are present a couple of hours before ovulation/release of mature ovum from the ovary thus the secondary follicles still actually contain primary oocytes
Thank you for this video
Best explanation ever, thank you for making this complicated process easier for me 🤓💗
You are really good at teaching! Also I'm curious, do you draw all that yourself?
best lectures
this video is very much useful! hope to see more videos from u !
Love it . Also great job on the notes ! Thank you.
you're doing a great job :) Thankyou for these lectures.
great lec
great video!!! thank u so much :) ..i have been struggling with Embryology
wow thank you very much really amazing explanation
Better than books.
Perfect explanation 🤩
isn't the peritoneal cavity a different thing?
He's the best
Thanks a lot Dr!
Best explanation ever❤️❤️❤️❤️
Great Video !!!
Simon Murphy Thanks for watching Simon
Thanks man. Great video.
thank you for the explanation!!
Thank you !!!!!
so helpful. Thank you so much!
Thank you for your help!!
Kelsy Mitchell you're welcome Kelsy!
this was sooo helpful!!! thank you so much
You are awesome sir thankyou
Wonderful thank you so much😍
thank you very much!
Thank you so much ❤️
I like that, but shouldn't it be 2n in the Picture of the Ovum after the meiosis 2 ? last stage cuz a fertilization happened?? x
+Maz T ^^" I get it now thanks for the video I kept watching it over & over until I got it
Excellent job // MDstudent
Walentin Kingstam you're very welcome :)
nice video ...
i learnd more 4fm it
you are amazing
very helpful :) thank you and well done!
YOU'RE SO GOOOOODDDDD
Wow!!!! Perfect !!!!
Perfectttt. thanks so much
nicks Fantabulous you're welcome :)
The real OG
Really nicely explained, great teaching skills :)
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You saved my life lol
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bit too fast..explanation
Good lectures but your voice is jarring bro
umm, you look more smart in white shirt infact
People watched this 3 years ago and am doing it for an exam now😊...
اتمنى ترجمتها للغه العربيه لتعم الفائده ✨✨
Non ending speaking..wow this man is good
This is a great explanation of oogenesis! Thanks so much.
I 💜ur explaination
Danya Aziz thanks! :)
سبحان الله😂😂 اثنيناتنة نشوف نفس الفيديو للمرة الثانية😅 بس هذا صدوك تووب هم يفهم وهم يسوي واهس🙈🌚
Best explanation ever....
thank you!
hi, well correct me if I'm wrong but the oocyte remains primary until tertiary (Graffian) follicle ruptures, once the oocyte is released it becomes secondary. Other than that, very helpful diagrams thanks a lot
Nope
no, actually it becomes a secondary oocyte in the tertiary follicle.
This guy hasn’t taken sociology/gender studies which says there is 0 difference between men and women....
Yeah, he's sane
I can't thank you enough for this, everything makes sense!
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EXCELLENT EXPLANATION tanx fr making it easier to understand
thanks
Best explanation, you are really amazing 👍🧡
❤️🤩🌷🌹👏🙏
Thank goodness I found AK lectures they are helping me in studying for my MCAT
Some other important things are missing. Including the processes that lead to the transformation of a primordial follicle into an ovarian graafian follicle that has granulosa cells, how does it happen?. Also how the zona pellucidar is formed, that part is missing.
HOW CAN OVUM PRODUCE DURING FERTILIZATION U WRITTEN LAT POINT ABOVE DIAGRAMM ??????? :/
Isn't the tertiary follicle the one that is ovulated instead of secondary..
Wow! This video was awesome. I was struggling with understanding oogenesis in my physiology course. But your video helped me to fully understand the process
Short video but I have learned well. Thank you so much.
Your videos are great and very informative. Thanks again for the clear explanation! :)
Thank u soo much..finally understood
Can't beat dr.Najeeb srry
I am having a bit of predicament. Is it that primary oocyte remain arrested at prophase I until ovulation? So I assume that the primary and secondary follicle contains the primary oocyte until ovulation when primary oocyte complete meiosis I and become secondary oocyte. But in your video you mentioned that secondary follicle contains the secondary oocyte. May I ask did I misunderstood anything?
I NEED YOU HELP
ကျေးဇူးပါဗျို့😭
great vedio sir
Thank you very much for this video!
One thing to add to the other comments
What thickening the endomerio is Progesterone and not Estrogene
W
Thanks ❤️
OWOgenesis
in which phase does the secondary oocyte presses the pause button after rupture of follicle till the fertilisation occurs???????????????????
thank you very much for all your helpful lectures I am a medical student and I alwayes enjoy your learning way
I hope you more success 🌼🌼🌼
and what about the 3rd follicle? don't the changes start after the formation of the 3rd follicle?
is an ovum haploid or diploid? his diagrams say (n) but doesn't the mature ovum form after fertilization thus making it (2n)?
You are amazing ❤️❤️❤️!! Please can you include español captions?