The basement membrane is an essential component of various organs and tissues in the human body. It serves as a barrier that separates epithelial or endothelial cells from the underlying stroma. There are several synonyms for the basement membrane, including basal lamina, basal membrane, and reticular lamina. Each of these terms refers to the same thin layer of extracellular matrix that surrounds cells and provides structural support. The basement membrane is vital for tissue development, maintenance, and repair, and its dysfunction has been implicated in various pathological conditions, including cancer, fibrosis, and kidney diseases. Studying the basement membrane's structure and function can provide insights into tissue physiology and disease pathogenesis.