1.

During the reproductive cycle of a human female, when, where and how does a placenta develop ? What is the function of placenta during pregnancy and embryo development ?

Answer»

After implantation, uterus, chorionic villi and uterine tissue become interdigitated (physically fused) to form a structural and functional unit between the developing embryo and the maternal body called placenta. 

Functions: 

(i) Placenta facilitates supply of oxygen and nutrients to the embryo. 

(ii) Removes carbon dioxide, waste material and excretory material produced by the embryo. 

(iii) Produces hC G/h PL, estrogens and progestrogens.



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