The middlemost embryonic germ layer to develop is
A) ectoderm.
B) endoderm.
C) mesoderm.
D) protoderm.

Question

Quizplus · Accepted Answer

The mesoderm is the middlemost embryonic germ layer to develop, forming between the ectoderm and endoderm during gastrulation. It gives rise to structures such as muscle, bone, and blood vessels. The ectoderm forms the outermost layer, giving rise to the nervous system and skin, while the endoderm forms the innermost layer, giving rise to the digestive and respiratory systems. "Protoderm" is not a recognized term in embryology.

The Middlemost Embryonic Germ Layer to Develop Is