1. high cellularity

2. all epithelial is avascular (no direction blood supply)

3. can regenerate fairly quickly

1. provide physical protection

2. provide sensation

3. control permeability

• one layer of cells on the basal lamina
• allows for diffusion
• lining of internal compartments and passageways; such as surfaces of the lungs

several layers of cells on the basal lamina

found in areas subjected to mechanical and chemical stress

• thin falt cells on the exposued surface
• found in areas where a slick surface reduces friction and a thin lining is needed to allow gas exchange
• 1. the lining of the lungs surface
• 2. serous membranes of the ventral body cavitiy called Mesothelium; Pleura- layer around lungs, pericaridum- layer around heart, peritoneum-layer around stomach
• 3. endothelium- linng of heart and blood vessels

pleura- layer around the lungs

pericardium-layer around the heart

peritoneum-layer around the stomach

found in areas most subject to mechanical and physical stress

the surface of the skin, linings of mouth, throat, esophagus, rectum, vagina, anus

provide limited protection

have great absorptive and secretory capabilities

Locations:kindney tubules, pancreas, salivary glands, and thyroid follicles

stretches and changes shape due to lumen (open space) they surround expanding

Locations; renal pelvis, ureters, and urinary bladder

(CILIATED)many cell tpyes exist (looks like columnar)

Locations: upper respiratory passages and the male reproductive tract