Cell groups have extracellular fluids and matrices. Fluids outside cells supply nutrients. Connective tissue {extracellular matrix}| (ECM) supports body organs. Connective tissue has collagen, elastin, glycoproteins, and glycosaminoglycans. Glycoproteins include laminin, fibronectin, enactin, and nidogen. Glycosaminoglycans include ground substance, heparan sulfate, and proteoglycans.
Activated macrophages and trophoblast cells produce proteinases to break down ECM. Tumors produce gelatinase, glycosidase, hyaluronidase, and heparanase.
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Date Modified: 2022.0224