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Skin and Body Membranes

Skin and Body Membranes. Function of body membranes Line or cover body surfaces Protect body surfaces Lubricate body surfaces. Classification of Body Membranes. Epithelial membranes Cutaneous membrane Mucous membrane Serous membrane Connective tissue membranes. Cutaneous membrane = skin

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Skin and Body Membranes

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  1. Skin and Body Membranes • Function of body membranes • Line or cover body surfaces • Protect body surfaces • Lubricate body surfaces

  2. Classification of Body Membranes • Epithelial membranes • Cutaneous membrane • Mucous membrane • Serous membrane • Connective tissue membranes

  3. Cutaneous membrane = skin • A dry membrane • Outermost protective boundary • Superficial epidermis • Keratinized stratified squamous epithelium • Underlying dermis • Mostly dense connective tissue Cutaneous Membrane

  4. Surface epithelium • Type depends on site • Underlying loose connective tissue (lamina propria) • Lines all body cavities that open to the exterior body surface • Often adapted for absorption or secretion

  5. Surface: simple squamous epithelium • Underlying: areolar connective tissue • Lines open body cavities that are closed to the exterior of the body • Serous layers separated by serous fluid Serous Membranes

  6. Specific serous membranes • Peritoneum • Abdominal cavity • Pleura • Around the lungs • Pericardium • Around the heart Serous Membranes

  7. Connective Tissue Membrane • Synovial membrane • Connective tissue only • Lines fibrous capsules surrounding joints

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