Adapted from a Power Point by Cassie Clemans Body Membranes Adapted from a Power Point by Cassie Clemans

Function of Membranes?

Cutaneous Membranes The skin! Dry membrane – why? Exposed to air Protective functions Tissue types?

Mucous Membranes (Mucosa) Wet – why? Bathed in mucous, saliva, or urine Lines body cavities open to the exterior Digestive Respiratory Urinary Reproductive

Mucosa - Functions Protection – close to exterior Absorption – small intestine Secretion – respiratory, digestive Tissue types?

Serous Membranes (Serosa) Lines body cavities closed to the exterior Thoracic cavity Abdominopelvic cavity Secretes serous fluid for lubrication

Naming Serosa Parietal – covers walls Visceral – covers organs Made from one folded membrane Examples: Parietal & visceral pleura – line pleural cavity & lungs Parietal & visceral pericardium – line pericardial cavity & heart Parietal & visceral peritonium – line abdominal cavity & organs

Parietal & Visceral Serosa

Synovial Membranes Lines tendon sheathes at joints and small openings called bursae Secrete lubricating fluid (synovial fluid) Cushion organs moving against each other Connective tissue only