A basal lamina is simply a layer (LAMINA, plural, LAMINAE) at the base (BASAL) of something. It may be a layer of MEMBRANE on an individual CELL or it may be a layer at the base of a structure. The OLFACTORY EPITHELIUM for example is described as...

The basal lamina is a layer of extracellular matrix on which epithelium sits and which is secreted by the epithelial cells. It is often confused with the basement membrane, and sometimes used inconsistently in the literature, see below. It is typically...