Which is a vascular layer of skin?

Sweat glands in human skin are located in the

Leather from mammalian skin is derived from

In the old age of man,the skin gets wrinkled because of:

The stratum germinativum of the skin is made up of:

The characteristic protein of the horny parts of the skin of terrestrial vertebrates, such as hairs, feathers, nails, and hoofs, is: