1. Cutaneous Membrane Skin! Stratified squamous epithelium with keratin Has an underlying dermis Differs from the other types of epithelial membranes: It is DRY!
2. Mucous Membranes Lines all body cavities OPEN to the outside world Either stratified squamous or simple columnar Moist/Wet Absorption Secretion
3. Serous Membranes Line body cavities CLOSED to the outside world Single layer of simple squamous epithelium Serous membranes occur in pairs Visceral Parietal Both membranes secrete “serous fluid” so that organs can move without friction
Parietal vs. Visceral
Pleura & Pericardium
Connective Tissue Membranes NO epithelium; just connective tissue Synovial membranes Line the capsules that surround joints Provide a smooth surface Secrete “synovial fluid,” which lubricates