Membrane

Membrane, in Anatomy. This term is applied to designate those textures of the animal body which are arranged in the form of laminae, and cover organs, or line the interior of cavities, or take part in the formation of the walls of canals or tubes. The structure and special uses of some of the most important of the animal membranes are noticed in separate articles, such as Mucous Membrane (see DIGESTION), Serous Membrane (q.v.), &c.; and the membranes in which the foetus is enclosed are described in the article Placenta.