https://www.sciencedaily.com/releases/2021/03/210309091317.htm

https://www.pnas.org/content/118/11/e2022422118

The basement membrane is a thin, pliable sheet-like type of extracellular matrix, that provides cell and tissue support and acts as a platform for complex signalling. The basement membrane sits between epithelial tissues including mesothelium and endothelium, and the underlying connective tissue. https://en.wikipedia.org/wiki/Basement_membrane