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

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 LLine the ventral body cavities: thoracic & abdominopelvic PParietal VVisceral SSimple squamous epithelium overlying connective tissue SSecretes a watery fluid to keep membranes lubricated C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)