DENDROLOGY

Detailed explanation-1: -Skin and hair. The skin of mammals is constructed of two layers, a superficial nonvascular epidermis and an inner layer, the dermis, or corium. The two layers interlock via fingerlike projections (dermal papillae), consisting of sensitive vascular dermis projecting into the epidermis.

Detailed explanation-2: -The typical mammalian hairy skin (or fur) includes the living follicle (the hair pit), sebaceous (oil) glands that help maintain the moisture and flexibility of the hair, sweat glands that provide water, and the threadlike growth that is called hair or fur.