BSC2085L Midterm Review

simple squamous epithelium

single layer of flat cells

forms very thin and delicate membranes

allows for easy movement of molecules across the membrane via processes such as osmosis, diffusion, and filtration

found in the kidney glomeruli, alveoli of the lungs, lining of the heart, blood vessels, lymphatic vessels, and serous membranes

simple cuboidal epithelium

single layer of cube-shaped sizes

capable of secretion and absorption 

found in kidney tubules, small ducts and covering the ovary 

simple columnar epithelium

single layer of column-shaped cells

capable of secretion and absorption 

found lining most of the digestive tract, gallbladder, ducts of large glands, small bronchi, and uterine tubes 

microvilli 

brush border 

short slender cell processes that increase the surface area available for absorption of nutrients 

found in sections of the digestive tract

cilia 

hair-like; beat in unison to propel substances: mucus in the bronchi and ova in the uterine tubes

pseudostratified columnar epithelium 

cells are only in one layer but are different heights making this tissues appear stratified

packed tightly together

found in the lining of the trachea, most of the upper respiratory tract, and male reproductive ducts

stratified squamous epithelium keratinized

many layers of flat cells that provide protection for underlying tissues 

deepest layers are almost cuboidal in shaped and actively dividing 

cells become flatter as they are pushed toward the surface by newer cells

upper layers are dead and filled with keratin