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The Circulatory System.!
The circulatory system is made up of the vessels and the muscles that help control the flow of the blood around the body.The main parts of the system are the heart, arteries, capillaries and veins.
when blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta..The blood leaving the aorta is full of oxygen.The oxygen rich blood travels throughout the body in its system of arteries into the arterioles. On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.
