HCT I

 Membrane- A thin sheetlike structure covering and protecting the body surface, line body coavities and cover inner surfaces of the hollow organs (digestive and respiratory)  Two major categories  Epitheleal  Connective tissue membrane

 Epitheleal- composed of epithelial tissue and an underlying layer of specialized connective tissue  Three types in the body  Cutaneous membrane  Serous membranes  Mucous membranes

 Cutaneous Membrane (the skin)  The primary organ of the integumentary system.  Approximately 16% of body weight

 Found only in closed cavities  Made up of two layers  Simple squamous epithelium  Connective tissue basement membrane that supports the epithelial cells.

 Two types  Parietal- lines the walls of a body cavity  Visceral- covers the surface of the organs.  Named for the cavity the belong to  Pleura- thoracic cavity  Peritoneum-abdominal

 Line the body surfaces opening directly to the exterior  Produce mucus to keep the membrane moist and soft  Mucocutanous junction- where skin and mucous membranes meet. (eyelids, nasal opening, anus)

 Does not contain epithelial components  Produces a lubricant called synovial fluid  Examples  Membranes in the space between joints  Lining of bural sacs

 Pleurisy- inflammation of the serous membranes that line the chest cavity and cover the lungs  Pain is causes by irritation and friction as the lungs rubs against the walls of the chest.

 Peritonitis- is an inflammation (irritation) of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs  Can be a serious complication of an infected appendix.

 Inflammation of the fluid-filled sac (bursa) that lies between a tendon and skin, or between a tendon and bone.