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How does the cardiovascular system work?

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The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. read more

The cardiovascular system is a complex network of blood vessels that keep our cells supplied with the oxygen and nutrients necessary for everyday functions. Think of the system as a well-organized, speedy delivery company much like FedEx or UPS, with blood vessels as the one-way streets making it all possible. read more

Your heart is the pump for your circulatory system. It is made of muscle and contracts in order to pump blood through your body. The arteries and veins are the roadways through which blood is transported to all parts of your body. read more

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