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?
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
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
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
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
Love your lecture! Briefly and clearly explained:) may i ask about the graafian follicle? I found it on my textbook but it was quite confusing.. Btw your fluent English truly amazed me:)
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 wonderful!!! u have a talent in teaching ! i have an exam tomorrow and most probably ill get a good grade just because of u ....thanks for ur kindness :)
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.
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?
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This is a great explanation of oogenesis! Thanks so much.
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
Thank goodness I found AK lectures they are helping me in studying for my MCAT
Best explanation ever....
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Love it . Also great job on the notes ! Thank you.
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You are a King. Thank you for making these!
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
EXCELLENT EXPLANATION tanx fr making it easier to understand
Hey this was uploaded on my birthday! Thank you for your clear and concise explanation :D
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اتمنى ترجمتها للغه العربيه لتعم الفائده ✨✨
Thanks for the video
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Outstanding explanation !
Thank you, keep up the good work ♥️
Thank you very much for this video!
One thing to add to the other comments
What thickening the endomerio is Progesterone and not Estrogene
fully understood! this has really helped in my anatomy class
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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 video is very much useful! hope to see more videos from u !
wow thank you very much really amazing explanation
100% great video
It's so good to understand
Thank a lot
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so helpful. Thank you so much!
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
Thank you for this Video !!!!!! VERYY helpful !
Best explanation, you are really amazing 👍🧡
Short video but I have learned well. Thank you so much.
Thanks a lot Dr!
Thank you so very much!
you are a MIRACLE !!!
thank you so much :(
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
Love your lecture! Briefly and clearly explained:) may i ask about the graafian follicle? I found it on my textbook but it was quite confusing.. Btw your fluent English truly amazed me:)
Yvan Liew its the mature follicle
You are an amazing teacher
Could you please make a video about embryonic development as well?
That was really good thanks
Thank you for this video
Best explanation ever❤️❤️❤️❤️
thank you so much! you saved my exams!!!!
very helpful :) thank you and well done!
Thank you so much ❤️
thank you very much!
this is great ❤❤❤ thanks a lot
you're amazing!
Thank u soo much..finally understood
it was really helpful , thanks
Ak you are the best
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?
in which phase does the secondary oocyte presses the pause button after rupture of follicle till the fertilisation occurs???????????????????
I 💜ur explaination
Danya Aziz thanks! :)
سبحان الله😂😂 اثنيناتنة نشوف نفس الفيديو للمرة الثانية😅 بس هذا صدوك تووب هم يفهم وهم يسوي واهس🙈🌚
best lectures
Better than books.
Amazing!!👏👏👏
and what about the 3rd follicle? don't the changes start after the formation of the 3rd follicle?
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Thanks AK.
shaikh zoya you're welcome :)
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Wonderful thank you so much😍
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you are wonderful!!! u have a talent in teaching !
i have an exam tomorrow and most probably ill get a good grade just because of u ....thanks for ur kindness :)
by the way ive never commented to anyone on youtube before ;)
+juana braiteh You're welcome! best of luck on your exam tomorrow!
You are awesome sir thankyou
Perfect explanation 🤩
He's the best
You are amazing ❤️❤️❤️!! Please can you include español captions?
Thank you for your help!!
Kelsy Mitchell you're welcome Kelsy!
Thank you !!!!!
is an ovum haploid or diploid? his diagrams say (n) but doesn't the mature ovum form after fertilization thus making it (2n)?
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.
very very good lecture.....and .....good explanaition
great lec
awesome!!!
Thanks ❤️
Lovely!
thanks so much
:)
thanks
Thanks , good explanation