The normal wound healing process involves a complex series of four overlapping but distinct steps. During the initial steps, platelets from the blood control bleeding by signaling the formation of a protein matrix plug; they also generate molecules that will constrict blood vessels and mobilize other types of cells to the site. These additional cells kill pathogens in the wound area and trigger wound healing and blood vessel formation. In later steps, the protein matrix, blood vessel growth and connections are even further developed, and skin and other surface cells begin to migrate to the site. Together, the skin and protein matrix form granulation tissue to repair and close the wound … read more