Circulatory System Study Guide

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1)The circulatory system consists of the heart, blood, and blood vessels. There are three types of blood vessels: arteries, veins and capillaries. The heart is an organ made of cardiac muscle and it acts like a pump.
2)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. Arteries carry oxygen-rich blood from your heart to the rest of your body. Veins return the blood to the heart after the oxygen has been used. Your body needs oxygen in order to function. When you walk, your leg muscles need increased amounts of oxygen in order to do their work.
3)No the circulatory

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