epithelial cells

pseudostratified

some cells do not reach the free surface, all cells rest on the basement membrane

transitional

specifics morphological characteristics, accommodates distension (stretches)

endothelium

epithelial lining of blood vessels

zonula occludens

tight junction at the top, acts as a barrier, occludins

zonula adherens

adherens junction, adhesion device surrounding the cells, cadherins link bundles of actin

macula adherens

desmosome, spot contact adhesion device, cadhereins link keratin filaments

hemidesmosomes

epithelial cells are anchored to the underlying connective tissue, integrins connect keratin to laminin

gap junctions interconnect epithelium & other cell types, do not provide strong physical support or attachment,

they electrical coupling of cells, allow diffusion of ions between cells, connexins