Question

From which human embryonic layer do the epidermis of the skin and the nervous system develop?

Answer 1

Ectoderm.

Explanation:

Ectoderm is the exterior or most distal of germ layers in the very early embryo.

The ectoderm differentiates to form the nervous system ( spine, peripheral nerves and brain ) , the epidermis of skin and the tooth enamel.
It also forms the lining of mouth , anus, nostrils, sweat glands, hair and nails.