Covering and Lining Membranes
Covering and Lining Membranes
Covering and Lining Membranes
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10/16/2008Mucous <strong>Membranes</strong>• Lines body cavities that open to theexterior, such as those of the holloworgans of the digestive, respiratory, <strong>and</strong>urogenital tracts.• They are wet or moist membranes that arebathed by secretions.• The connective tissue portion of a mucousmembrane is called the lamina propria.Mucous Membrane continued…• The epithelial sheet is directly underlain bya layer of loose connective tissue calledthe lamina propria.• Are often adapted for absorption <strong>and</strong>secretion.Serous <strong>Membranes</strong>• Moist membranes found in closed ventralbody cavities.• Consists of simple squamous epitheliumresting on a thin layer of loose connectivetissue.• Parietal lines the outer wall of the internalchamber. The visceral portion coversorgans within the body cavity.2