, pl -ae Triple-layered structure on which epithelium sits: it consists of an electron dense layer (lamina densa) between two electron transparent layers (lamina lucida). The lamina densa is composed [..]

A thin sheetlike network of extracellular-matrix components that underlies most animal epi-thelial layers and other organized groups of cells (e.g., muscle), separating them from connective tissue.

Extracellular matrix secreted by epithelial cells. Found on the integument of insects.

A proteoglycan and glycoprotein sheet secreted by cells to form the extracellular matrix. The basal lamina, also called the basement membrane, is a three-layer structure that influences cell polarity, differentiation, and migration.