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प्रश्न
Define the following:
Implantation
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उत्तर
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संबंधित प्रश्न
Where is the male gamete formed in humans?
Why is it an advantage for the testes to be situated in the scrotal sac outside the main body cavity? Can you think of one disadvantage?
Which structure in human female is equivalent to the penis in the male?and in what respect the structures are equivalent?
When a fertilised egg E formed in the oviduct of a human female divides repeatedly to form an embryo, the embryo gets implanted in the thick and soft lining of the uterus. After this a disc-like special tissue T develops between the uterus wall and embryo through which all the requirements of the developing embryo (and foetus) are met from the mother's body, The embryo is connected to the tissue T through a string like structure S.
(a) What is the other name of fertilised egg cell E?
(b) What is the name of tissue T?
(c) Name the string-like structure S.
(d) Name two substances which pass from mother's blood to embryo through tissue T and, one type of substance which passes from embryo to mother's blood.
(e) What happens to S when the baby is born? Why?
List two changes observed in girls at the time of puberty.
State the role of placenta in the development of embryo.
Sketch and label human female reproductive system.
Is the woman responsible for sex-determination of child? Justify your answer.
Choose the correct answer:
When pregnancy does not occur, the life of corpus luteum is about _____________
Explain the term Parturition or birth.
Choose the Odd One Out:
