Question

Extra embryonic membranes of embryo are derived from

• A. follicle cells
• B. inner cell mass
• C. formative cell
• D. trophoblast

Answer 1

The correct option is D trophoblast

Blastomeres in blastocyst are arranged into
1. an outer layer of cells called trophoblast
2. an inner group of cells attached to the trophoblast called the inner cell mass.
The trophoblast attaches to the endometrium and gives rise to the extra embryonic membranes of chorionic sac, amniotic sac, allantois and yolk sac.
The inner cell mass develops into an embryo.