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
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
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
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 :)
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 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
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.
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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
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
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fully understood! this has really helped in my anatomy class
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.
thanks
Thank u soo much..finally understood
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Better than books.
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i have an exam tomorrow and most probably ill get a good grade just because of u ....thanks for ur kindness :)
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Perfect explanation 🤩
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One thing to add to the other comments
What thickening the endomerio is Progesterone and not Estrogene
very very good lecture.....and .....good explanaition
Excellent job // MDstudent
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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
Thanks ❤️
Great video, really well explained. Thank you :)
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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 your help!!
Kelsy Mitchell you're welcome Kelsy!
You are amazing ❤️❤️❤️!! Please can you include español captions?
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THANK YOU VERY MUCH
Thanks , good explanation
Great Video !!!
Simon Murphy Thanks for watching Simon
Thank you so much ❤️
You are awesome sir thankyou
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.
this is great ❤❤❤ thanks a lot
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Thank you !!!!!
Lovely!
very helpful :) thank you and well done!
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You are really good at teaching! Also I'm curious, do you draw all that yourself?
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