(Anat.) The external membranous integument of an animal. Note: In man, and the vertebrates generally, the skin consist of two layers, an outer nonsensitive and nonvascular epidermis, cuticle, or skarfskin, composed of cells which are constantly growing and multiplying in the deeper, and being thrown off in the superficial, layers; and an inner sensitive, and vascular dermis, cutis, corium, or true skin, composed mostly of connective tissue.