Categories: Anatomy stubs | Integumentary system In zootomy, the integumentary system is often the largest organ system of an animal, comprising skin, hair, feathers, scales, nails, skin glands and their products (sweat, slime). ... A close-up of human skin. ... Sweating (also called perspiration or sometimes transpiration) is the loss of a watery fluid, consisting mainly of sodium chloride (commonly known as salt) and urea in solution, that is secreted by the sweat glands in the skin of mammals. ... The sebaceous glands are glands found in the skin of mammals. ... Young Girl Fixing her Hair, by Sophie Gengembre Anderson Hair is a filamentous outgrowth from the skin, found mainly in mammals. ... Nails: left hand, adult human male Anatomy In anatomy, a nail is a horn-like piece at the end of an animal finger or toe. ... A close-up of human skin. ... Epidermis is the outermost layer of the skin. ... The stratum corneum (the horny layer) is the outermost layer of the epidermis, and comprises the surface of the skin. ... The Stratum Lucidum is one of the layers of the Epidermis. ... Stratum granulosum contains 3 to 5 rows of flattened cells whose cytoplasm contains small granules. ... It is a multiple-layered arrangement of cuboidal cells containing molecular bridges that conect them to adjacent cells. ... Stratum germinativum or stratum basale is the layer of keratinocytes that lies at the base of the epidermis immediately above the dermis. ... The dermis is the layer of skin beneath the epidermis, that consists of connective tissue and cushions the body from stress and strain. ... The subcutis is the layer of tissue directly underlying the cutis. ...