Can u explain the process of mensuration...
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The removal of the inner thick lining and soft lining of the uterus in the form
of vaginal bleeding it occurs 14 days after ovulation.
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When a girl is born, her ovaries contain thousands of immature eggs which are contained in immature follicles. When the girl reaches puberty, one follicle develops at a time to form a mature egg.
On maturing, the follicle bursts and egg shoots out of ovary. The release of the egg from an ovary is called ovulation. It takes place on the 14th day of the beginning of the menstrual cycle.
Before every ovulation, the inner lining of the uterus becomes thick and soft with many blood vessels in it.
a) If the egg gets fertilized by a sperm, then the uterus has to keep this fertilized egg for further development and supply it with food and oxygen.
b) If the egg does not get fertilized by a sperm, the thick and soft uterus lining having blood vessels is not required. The unfertilized egg dies within a day and uterus lining also break down and sheds blood.
The breakdown and removal of the inner, thick and soft lining of uterus along with its blood vessels in the form of vaginal bleeding is known as menstruation; more commonly known as periods.
To sum it up: Menstruation occurs if an egg released by an ovary does not get fertilized due to non-availability of sperm at the time of ovulation.
On maturing, the follicle bursts and egg shoots out of ovary. The release of the egg from an ovary is called ovulation. It takes place on the 14th day of the beginning of the menstrual cycle.
Before every ovulation, the inner lining of the uterus becomes thick and soft with many blood vessels in it.
a) If the egg gets fertilized by a sperm, then the uterus has to keep this fertilized egg for further development and supply it with food and oxygen.
b) If the egg does not get fertilized by a sperm, the thick and soft uterus lining having blood vessels is not required. The unfertilized egg dies within a day and uterus lining also break down and sheds blood.
The breakdown and removal of the inner, thick and soft lining of uterus along with its blood vessels in the form of vaginal bleeding is known as menstruation; more commonly known as periods.
To sum it up: Menstruation occurs if an egg released by an ovary does not get fertilized due to non-availability of sperm at the time of ovulation.
snigdha74:
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Well answered!!!
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nice
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