Mucous Membrane

Mucous Membrane. The mucous membranes form the internal lining of certain cavities in the body. The mucous membrane of the digestive tract extends from the mouth throughout the whole length of the alimentary canal, and is more particularly described under Digestion (q.v.). The mucous membrane of the respiratory tract lines the larynx, trachea, and extends along the bronchi into the pulmonary cells. [Lungs.] The genito-urinary tract is also lined throughout by mucous membrane.