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Byju's Answer
Standard IX
History
Rise of Christianity
The structura...
Question

The structural and functional unit between developing embryo (foetus) and maternal body is called

A
Placenta
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B
Parturition
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C
Umbilical cord
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D
Chorionic villi
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Solution

The correct option is A Placenta
Placenta

Placenta is the structural and functional connection between the uterine wall and the foetus.

It provides nourishment from the maternal blood to the foetus and removes the waste materials.

Final answer:

(c) Placenta

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Q. 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?
Q.

Name the following :

(a) The fluid surrounding the developing embryo.

(b) The body part in which the embryo develops.

(c) The membrane which protects the foetus and encloses a fluid.

(d) the canal through which the testes descend into the scrotum just before birth in human male child.

Q.

Define foetus. After how many weeks of development, a human embryo is said to become a foetus?

Q. Match column I with column II and choose the correct option.
Column I Column II
(a) Sertoli cells (i) Secrete androgens
(b) Interstitial cells (ii) Provide nutrition to the germ cells
(c) Placenta (iii) Structural and functional unit between foetus and maternal body
(d) Zona pellucida (iv) Acellular layer formed by secondary oocyte

Q. What is difference between embryo and foetus?
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