Question

(a) Explain the terms: (i) Implantation (ii) Placenta
(b) What is the average duration of human pregnancy?​

Answer 1

Answer:

Implantation:- Implantation is the stage of pregnancy at which the embryo adhere to the wall of uterus.

Placenta:- The placenta is an organ that develops in uterus during pregnancy. This structure provides oxygen and nutrients of growing baby.

The average duration of human pregnancy is 280 days.

Answer 2

Answer:

hope it helps

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(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.

(b) The average duration of human pregnancy is 40 weeks or 280 days.

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