hct i. membrane- a thin sheetlike structure covering and protecting the body surface, line body...
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BODY MEMBRANESHCT 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
1. Cutaneous Membrane
Cutaneous Membrane (the skin) The primary
organ of the integumentary system.
Approximately 16% of body weight
2. Serous Membranes Found only in
closed cavities Made up of two
layers Simple
squamous epithelium
Connective tissue basement membrane that supports the epithelial cells.
Serous Membranes 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
3. Mucous membrane
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)
Connective Tissue Membranes
Does not contain epithelial components
Produces a lubricant called synovial fluid Examples
Membranes in the space between joints
Lining of bural sacs
Diseases 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
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.
Bursitis
Inflammation of the fluid-filled sac (bursa) that lies between a tendon and skin, or between a tendon and bone.