Tissue membrane 2

Three primary types epithelial membranes:

• Mucous membranes

• Serous membranes

• Cutaneous membranes

Mucous Membranes:

• line body cavities that open to the exterior

• Including hollow organs of digestive, respiratory, urogenital tracts

Epithelial sheet:

lies over layer of loose connective tissue called lamina propria

Serous Membranes

are moist membranes of closed, ventral body cavities

Parietal serosae

line internal body cavity walls

Visceral serosae

cover internal organs

Pleural Membrane:

surrounds the lungs in the two pleural cavities

• reduces friction between the lungs and the body wall.

• Parietal pleura is further subdivided into:

• — costal pleura

• — diaphragmatic pleura

• — mediastinal pleura

Pericardial Membrane:

surrounds the heart in the pericardial

cavity