NCERT Solutions for Class 8 Science Chapter 10
Important NCERT Questions
8th Chapter 10 Reaching the Age of Adolescence
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 3
What is menstruation? Explain.
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Menstruation is a natural biological process unique to females, occurring typically from puberty to menopause. Lasting about 28 days (though it varies), it involves the shedding of the uterus’s inner lining, known as the endometrium. Menstrual blood, a mix of blood and tissue, exits the body through the vagina. This cycle indicates the culmination of an unfertilized egg’s monthly cycle and signifies reproductive maturity in females, persisting unless pregnancy occurs.
In a female reproductive ovaries, the ova begin to mature with the onset of puberty. One ovum matures and released by one of the ovaries once in about 28 to 30 days. During this period, the wall of the uterus becomes thick so as to receive the egg, in case it is fertilized and begins to develop. If fertilization does not occur, the released egg and the thickened lining of the uterus along with its blood vessels are shed off. This causes bleeding in female which is called menstruation. Menstruation occurs once in about 28 to 30 days.
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