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In other words, the extracellular matrix largely determines how a tissue looks and functions. The extracellular matrix is made up of proteoglycans, water, minerals, and fibrous proteins. A proteoglycan is composed of a protein core surrounded by long chains of starch-like molecules called glycosaminoglycans.
Best Answer: There are three main types of extracellular matrix (ECM): loose connective tissue (Tendons, dermis, etc.), dense connective tissue (cartilage, bone) and basement membranes (underlie any epithelia and form special structure like molecular filter of the glomeruli).