Question

Describe the zygotic event leading to implantation and placenta formation in humans. mention any 2 function of placenta.

Answer 1

Funtions of placenta.

i It provides nutrition to the embryo.
ii. It increases the surace area for villi.

Answer 2

Answer:

(i) Implantation: The embedding

of a fertilised mammalian egg (embryo) into the inner thick wall of the uterus (womb) where it will continue its development is called implantation.

(ii) Placenta: It is a complex double-layered spongy vascular tissue in human female formed by the joint activity of maternal and foetal tissues in the wall of uterus that is meant for attachment, nourishment and waste disposal for the foetus.