● Circulatory - Carries blood and nutrients to the cells of the body - Arteries help carry oxygenated blood away from the heart. Veins carry un-oxygenated blood toward the heart. Capillaries are tiny blood vessels that connect arteries and veins. Gas exchange takes place here; Carries waste away from the cells, such as carbon dioxide. Main Parts - ■ Heart, blood(plasma, red blood cells, white blood cells, platelets), veins, and arteries.