Question

Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta.

Answer 1

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Post-zygotic events leading to implantation and placenta formation. After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by uterine tissue and maternal blood which become interdigitated with each other to form placenta. Events leading to formation of placenta. The chorionic villi and uterine tissue, after implantation become interdigitated with each other and form placenta, a structural and functional unit between embryo and maternal body.

⭕Functions of Placenta ⭕

(i) It facilitates the supply of oxygen and nutrients to the foetus and removal of C02 and excretion products.

(ii) It acts as an endocrine gland and secretes hormones like hPL, hCG, oestrogen and progesterone.

Answer 2

Explanation:

post zygotic events leading to implantation and placenta formation. the chorionic villi and uterine tissue after implantation become. interdigitated with each other and form placents a structural and functional unit between embryo and material body .

1. it's facilities the supply of oxygen and nutrition to the embryo.

2. it acid in the removal of carbon dioxide b(co2) and waste material produced by the foetu's.

I hope this will help ytu

I hope this will help you .

foetus(an unborn or unhatched offspring of a mammal in particular an unborn human more than eight weeks after conception).

a fetus or foetus is the unborn offspring of anborn child stage of development of the child)