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
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
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?
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
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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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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This is a great explanation of oogenesis! Thanks so much.
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Your videos are great and very informative. Thanks again for the clear explanation! :)
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
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fully understood! this has really helped in my anatomy class
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One thing to add to the other comments
What thickening the endomerio is Progesterone and not Estrogene
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Ak you are the best
اتمنى ترجمتها للغه العربيه لتعم الفائده ✨✨
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You are really good at teaching! Also I'm curious, do you draw all that yourself?
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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
Could you please make a video about embryonic development as well?
Thank you for your help!!
Kelsy Mitchell you're welcome Kelsy!
you're amazing!
Better than books.
Perfect explanation 🤩
Wonderful thank you so much😍
in which phase does the secondary oocyte presses the pause button after rupture of follicle till the fertilisation occurs???????????????????
Amazing!!👏👏👏
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Great Video !!!
Simon Murphy Thanks for watching Simon
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You are awesome sir thankyou
Thank you !!!!!
and what about the 3rd follicle? don't the changes start after the formation of the 3rd follicle?
YOU'RE SO GOOOOODDDDD
very very good lecture.....and .....good explanaition
do androgens not signify make sec hormones?
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?
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
great lec
Thanks ❤️
I 💜ur explaination
Danya Aziz thanks! :)
سبحان الله😂😂 اثنيناتنة نشوف نفس الفيديو للمرة الثانية😅 بس هذا صدوك تووب هم يفهم وهم يسوي واهس🙈🌚
isn't the peritoneal cavity a different thing?
thanks
is an ovum haploid or diploid? his diagrams say (n) but doesn't the mature ovum form after fertilization thus making it (2n)?
HOW CAN OVUM PRODUCE DURING FERTILIZATION U WRITTEN LAT POINT ABOVE DIAGRAMM ??????? :/
Thanks , good explanation
Wow!!!! Perfect !!!!
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.
Lovely!
awesome!!!