Final answer:
PDGF stimulates the rebuilding of the blood vessel wall, while VEGF stimulates endothelial cells to restore the endothelial lining and promote the growth of new blood vessels.
Step-by-step explanation:
Platelet-derived growth factor (PDGF) stimulates the rebuilding of the blood vessel wall by promoting cell proliferation, cell migration and adhesion, and angiogenesis (growth of new blood vessels). PDGF released from platelets plays a crucial role in the healing process by attracting cells to the site of injury and promoting tissue repair. Vascular endothelial growth factor (VEGF) stimulates endothelial cells to multiply and restore the endothelial lining, facilitating the formation of new blood vessels.