Development of Inner Cell Mass

Development of inner cell mass differentiated into;

1. Amnion layer of embryo cell

2. Umbilical cord

3. Foetus

After implantation, 2 cavity appear in inner cell mass.

1. Amniotic cavity/ amniotic sac contains amniotic fluid

Amnion membrane forming fluid filled cavity (amniotic sac that enclose the embryo).

2. Yolk sac

Before placenta form, yolk cell provide nutrition and gas exchange between mother and developing embryo.