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Membranes

Name the different types of membranes & their locations in the body. LT9 State names & locations of the ventral cavities’ serous membranes. LT10. Membranes. Types of membranes. Mucous Serous Synovial Meninges Cutaneous. Mucous membranes - location.

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Membranes

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  1. Name the different types of membranes & their locations in the body. LT9 State names & locations of the ventral cavities’ serous membranes. LT10 Membranes

  2. Types of membranes • Mucous • Serous • Synovial • Meninges • Cutaneous

  3. Mucous membranes - location • Line interior walls of organs & tubes that open to the outside of the body • Digestive tract • Respiratory tract • Urinary tract • Reproductive system • Epithelium overlying connective tissue layer • Containing goblet cells that secrete mucus

  4. Mucous membranes - function • Protects interior from invasion (bacteria, viruses) • Infection causes increased mucus (runny nose from a cold) • Protects walls of stomach & intestine from stomach acid / without it ulcers form

  5. Serous membranes • Line the ventral body cavities: thoracic & abdominopelvic • Parietal • Visceral • Simple squamous epithelium overlying connective tissue • Secretes a watery fluid to keep membranes lubricated • Compartmentalizes large thoracic / abdominopelvic & hinders spread of infection

  6. Synovial membranes • Line joint cavities • Composed of connective tissue • Secretes synovial fluid into joint cavity to lubricate the ends of the bones • Rheumatoid arthritis = inflammation of synovial membrane causing it to grow thicker. Fibrous tissue invades the joint & can become bony restricting movement.

  7. Meninges • Dorsal cavity membranes • Composed of connective tissue • Serve as protective coating for the brain & spinal cord • Meningitis = serious infection of the meninges

  8. Cutaneous membranes • Skin! = out covering of body • Thin outer layer of stratified squamous epithelium attached to a thicker underlying layer of connective tissue • Protection against environmental pathogens & abrasion

  9. Names & locations of the ventral cavities’ serous membranes. LT 10 • Thorax = pleural & pericardial • Lining of thoracic cavity & double back to cover lungs • Pleurisy = infection of this membrane • Pericardium = sack enclosing heart • Pericarditis = infection of this membrane • Abdomen = peritoneum & mesentery • Mesentery = parietal & visceral come together to support visceral organs • Greater omentum – double layered & covers intestines • Lesser omentum – runs between stomach & liver • Peritonitis – inflammation of peritoneum (happens with appendicitis)

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