Question

multiple choice question
what is the embryonic disc?
the flattened inner cell mass of the embryo
the yolk sac and amniotic sac combined
the attachment point of the conceptus to the uterus
the hollow cavity in the blastocyst

Explanation:

The embryonic disc is formed from the inner cell mass of the blastocyst. As development progresses, the inner cell mass flattens out to form this structure. The yolk sac and amniotic sac are separate extra - embryonic structures. The attachment point of the conceptus to the uterus is related to implantation and the placenta. The hollow cavity in the blastocyst is the blastocoele.

Answer:

The flattened inner cell mass of the embryo