Medicine is: -a chemical substance used to treat, prevent, or diagnose a disease -a chemical substance that alters one or more functions of the body -the promotion of the health of an entire community by controlling the spread of disease -the art and science of treating and preventing disease

avoiding recreational drugs instead of using them

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.