The extra-embryonic membranes of a mammalian embryo are derived from

The shock absorber fluid of the developing embryo is known as

The formation of the segmentation cavity indicates:

Given below are two statements with respect to gastrulation.
$Statement-I$: Root of amniotic cavity is lined by amniogenic cells, which divides to form chorion.
$Statement-II$: Chorion is an embryonic membrane that participates in development of the embryo.
Choose the most appropriate answer from the options given below.

At which stage of embryonic development do the cells migrate to form the germ layers?

In human beings,after .............. month of pregnancy,the embryo's heart is formed.