Fibronectin is a glycoprotein that is found in the extracellular matrix of a variety of animal tissues. It plays a crucial role in cell adhesion, growth, migration, and differentiation. Fibronectin also helps to organize the extracellular matrix and is involved in various physiological and pathological processes, such as wound healing, embryogenesis, and cancer metastasis. It is produced by various cell types, including fibroblasts, endothelial cells, and macrophages, and is essential for the proper functioning of tissues and organs. Deficiencies or abnormalities in fibronectin can lead to various diseases and disorders.