has part anatomical system integumental system integumentary system dermal system integumentum commune organism surface body surface Connected anatomical system that forms a barrier between an animal and its environment. In vertebrates, the integumental system consists of the epidermis, dermis plus associated glands and adnexa such as hair and scales. In invertebrates, the integumental system may include cuticle. external covering of organism surface entire sense organ system outer epithelium excretory system