Collagen is the most abundant protein in the ECM, accounting for approximately 30% of the total protein content in the human body. It forms long, fibrous structures that give tissues their tensile strength and resist deformation. Elastin is another important protein in the ECM, providing tissues with elasticity and the ability to recoil after stretching. Fibronectin is a glycoprotein that mediates cell adhesion and migration by binding to integrin receptors on the cell surface. Given its impo...