![]() Hormonesto cells, and removes waste products, like carbon dioxide. The circulatory system carries oxygen, nutrients, and Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system is made up of blood vessels that carry blood away from and towards the heart. ![]() The heart then sends the blood to the lungs to pick up more oxygen. After delivering the oxygen, the blood returns to the heart. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. The heart is a pump, usually beating about 60 to 100 times per minute.
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