Embryonic Development: The Primitive Streak

It serves as a protective covering for the developing embryo.

It is where the blastula forms.

It marks the beginning of gastrulation and the establishment of the three primary germ layers. (correct)

It is responsible for the development of the nervous system.

Formation of the blastula

Differentiation into specific cell types

Establishment of the three primary germ layers (correct)

Development of the nervous system

It ultimately regresses as gastrulation progresses and the body plan of the embryo becomes established. (correct)

It becomes a permanent structure in the developing embryo.

It develops into the central nervous system.

It transforms into the circulatory system.

<p>It helps establish the anterior-posterior and dorsal-ventral axes.</p> Signup and view all the answers

<p>It secretes molecules that guide cell movement and differentiation.</p> Signup and view all the answers