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Question
What is menstruation? Explain.
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Solution
In females, the reproductive phase of life begins at puberty (10 to 12 years of age) and generally lasts till the age of approximately 45 to 50 years. The ova begin to mature with the onset of puberty. In about 28 to 30 days, one of the ovaries matures and releases one ovum. During this period, the wall of the uterus becomes thick so as to receive the egg, in case it is fertilised and begins to develop. This results in pregnancy. If fertilisation does not occur, the released egg, and the thickened lining of the uterus, along with its blood vessels, are shed. This causes bleeding in women, which is called menstruation.
RELATED QUESTIONS
Reproductive age in women starts when their ______.
During menstruation, the progesterone level is _____
_______ usually occurs 14 days after ovulation.
During pregnancy, the corpus luteum continues to grow and produces large amount of estrogen and progesterone.
Give a suitable word for the following statement.
It marks the beginning of reproductive period.
The release of the ovum from the ovary is called ______.
The wall of ______ becomes thick to receive the fertilized egg.
______ is a temporary endocrine gland formed during pregnancy.
The male sex hormone is called estrogen.
The egg is released from the fallopian tube.
