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Question : What is placenta ? Describe its structure. State its functions in case of pregnant human female.

Answer»

Solution :For IMPLANTATION of foetus, a special tissue called PLACENTA develops from the maternal uterine wall. It is a disc shaped structure, in the uterine wall with VILLI on the embryonal side and large BLOOD spaces on maternal side.
Functions:
(i) It provides large surface area for GLUCOSE and `O_2` to pass from mother.s blood to the embryo.
(ii) It also removes embryonal metabolic wastes.


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