Question

Gastrulation begins when a groove with raised edges called the ________ appears on the dorsal surface of the embryonic disc.

Answer 1

Gastrulation begins when a groove with raised edges called the primitive streak appears on the dorsal surface of the embryonic disc.

A young developmental process known as gastrulation occurs when an embryo changes from a one-dimensional layer of epithelial cells (blastula) to a multilayered, multidimensional structure known as the gastrula.

The embryonic disc's epiblast then moves medially across other cells and into the primitive streak.

The three embryonic germ layers—the endoderm, ectoderm, and mesoderm—are positioned during gastrulation. Later, these layers grow into specific body systems. The ectoderm gives rise to the nervous system, the eye's lens, the mouth, nose, canal epithelium, as well as the skin, nails, and other body parts.

To learn more about gastrulation, refer

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