Your circulation system, also known as your cardiovascular system, is essential to wound healing because it is an important part of your body’s immune response. Your heart pumps oxygen and nutrient-rich blood away from the heart through your arteries. Your veins carry deoxygenated, nutrient-poor blood back to the heart. When you are injured, your blood carries extra nutrients and white blood cells to the injured tissue. If your circulation is limited, however, enough blood may not reach the wound which can delay healing. The longer a wound goes untreated, the greater the risk of infection, hospitalization and possibly amputation or loss of life.