Unit 3 Tissues, Membranes, and Integumentary System

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Unit 3 Tissues, Membranes, and Integumentary System Body Membranes Unit 3 Tissues, Membranes, and Integumentary System

Body Membranes Functions: 1. Line or cover body surfaces 2. Protect body surfaces 3. Lubricate body surfaces

Classification of Body Membranes 1. Epithelial Membranes - Cutaneous Membranes - Mucous Membrane - Serous Membrane 2. Connective Tissue Membranes -Synovial Membranes

Cutaneous Membranes Type of Epithelial Membrane Function: Protection Location: Outermost Layer Example: Skin Stratified squamous epithelium with keratin Has underlying dermis Differs from other types of membranes because its dry!

Mucous Membranes Type of Epithelial Membrane Function- absorption and secretion Location- Lines body cavities that open to the exterior body Examples- Nasal cavity, Mouth, Esophagus, Lungs and Bronchi Either Stratified squamous or simple columnar epithelium Moist/wet membrane

Serous Membranes Type of Epithelial Membrane Function- Protection of internal organs Location- Lines the body cavities that are CLOSED off to the exterior of the body Examples- Parietal Peritoneum, Visceral Peritoneum Single layer of simple squamous epithelium Serous membranes occur in pairs Visceral – covering of organs Parietal – walls of organs Both membranes secrete “serous Fluid” so that organs can move without friction

Synovial membrane Type of Connective tissue Membrane Function- Reduce friction in joints Line capsules that surround joints Provide a smooth surface Secrete “synovial fluid” to lubricate joint Location- Between joints Example- Bursa sac

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