Epithelial tissue locations

tight junction

• no leaks

• urinary bladder, GI tract

Desmosome

• connect plasma membranes of adjacent cells

• found in tissues with repeated tension and stretching

• heart, uterus, skin

Gap junctions

• Cells linked by tubular channel proteins

• epithelial cells of the intestine, heart, and smooth muscle tissue

simple squamous epithelium 

• found lining surfaces involved in passage of either gas or liquid

• mesothelium- lining of body cavities

• endothelium- lining blood and lymphatic vessels

simple cubodial epithelium

• found in areas where secretion and absorption occur

• absorption- renal tubules

• secretion- exocrine and endocrine

simple columnar epithelium

• some cells associated with absorption and secretion

• found in GI tract and ecretory ducts

stratifies squamous epithelium

• occurs in areas of the body subject to mechanical and chemical stresses

• skin, mouth, esophagus, vagina

stratified cubodial epithelium

• protects underlying tissues

• foun dprimarily along large excretoy ducts

• sweat glands, mammary glands, salivary glands

stratified columnar epithelium 

• secretion and protection

• in select parts of the respiratory, digestive, and reproductive parts

• along some excretory ducts

pseudostratified columnar epithelium

• respiratory tract and portions of the male reproductive tract  

transitional epithelium 

• found in areas required to expand and contract as part of their normal funciton 

• ureters, urethra, bladder