According to the University of Leeds, the basement membrane is a particular type of extracellular matrix that serves as a separator between cells and tissues located throughout the body. While primarily made of proteins, the exact composition of the basement membrane varies according to the cells that produce it.
Information from the University of Leeds states that the basement membrane is also known as the basal lamina. It serves a number of roles in the body. It surrounds some cells, such as muscle cells, which are all separated by the basement membrane. It can also separate whole sheets of cells, as it does in the kidneys, where it actually aids in the filtering of blood.