has part has_part anatomical system 解剖系统 integumental system 体被系统 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. body surface dermal system external covering of organism integumentary system integumentum commune organism surface surface 外皮系统 生物体的外部覆盖 生物体表面 真皮系统 表面 身体表面 连接的解剖系统，形成动物与环境之间的屏障。在脊椎动物中，包皮系统由表皮、真皮加上相关的腺体和附属物如头发和鳞屑组成。在无脊椎动物，包皮系统可能包括角质层。 outer epithelium 外层上皮