CLASSIFICATION OF BODY MEMBRANES

Epithelial Membranes

1. Cutaneous Membrane

2. Mucous Membranes

3. Serous Membranes

1. Cutaneous Membrane

Skin! Stratified squamous epithelium with

keratin Has an underlying dermis Differs from the other types of epithelial

membranes: It is DRY!

Cutaneous Membrane

2. Mucous Membranes

Lines all body cavities OPEN to the outside world

Either stratified squamous or simple columnar

Moist/Wet

Absorption

Secretion

Mucous Membranes

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

Peritoneum

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

Synovial Membranes