From which germ layer does the nervous system form?

A) Endoderm
B) Mesoderm
C) Exoderm
D) Ectoderm

Germ Layer

One of the primary layers of cells (endoderm, mesoderm, ectoderm) in the early embryo that gives rise to all tissues and organs.

Ectoderm

The outermost layer of cells or tissue of an embryo in early development, giving rise to the outer layer of skin, central and peripheral nervous systems, eyes, inner ear, and many connective tissues.

Endoderm

In early embryonic development, the most internal cell or tissue layer that evolves into the lining of the digestive and respiratory systems.