<P> The blood vessels are the part of the circulatory system , and microcirculation , that transports blood throughout the human body . There are three major types of blood vessels : the arteries , which carry the blood away from the heart ; the capillaries , which enable the actual exchange of water and chemicals between the blood and the tissues ; and the veins , which carry blood from the capillaries back toward the heart . The word vascular , meaning relating to the blood vessels , is derived from the Latin vas , meaning vessel . A few structures ( such as cartilage and the lens of the eye ) do not contain blood vessels and are labeled . </P>
<P> The blood vessels are the part of the circulatory system , and microcirculation , that transports blood throughout the human body . There are three major types of blood vessels : the arteries , which carry the blood away from the heart ; the capillaries , which enable the actual exchange of water and chemicals between the blood and the tissues ; and the veins , which carry blood from the capillaries back toward the heart . The word vascular , meaning relating to the blood vessels , is derived from the Latin vas , meaning vessel . A few structures ( such as cartilage and the lens of the eye ) do not contain blood vessels and are labeled . </P>
what blood vessels carry blood to the heart
what blood vessels carry blood to the heart
veins
veins