Question

What is a basement membrane? Layers?

Answer 1

At the base of the epithelial tissues is a layer of extracellular tissue that is known as the basement membrane. Whose main function is sustain and variable thickness.

Its layers are:

Basal lamina = composed in turn, by the lucida lamina and the dense lamina. Adipocytes, muscle cells and nerves are often found at the level of this lamina.

Reticular lamina = composed of denser and reticular fibers as well as a large number of proteins. It is also known as external lamina.