The function of the circulatory system is to transfer ------ and ------ to cell and carry –---- away from cell to the organ responsible for eliminating from the body. The heart is a muscular pump. When the heart -------- it produces pressure on the blood in circulatory system. This pressure pushes blood through the body. The body travels away from the heart vessels called -------- .It returns to the heart through vessels called -------- .To stop blood from flowing backwards,flexible flaps of tissue called ---------- are found throughout the circulatory system in the heart and vein. Arteries and veins are connected by tiny,thin walled vessels called --------- These very small vessels are in close contact with the organs and tissues of the body. The --------- of nutrients,wastes, oxygen and carbon dioxide occurs between tissues and the body through the walls of these small vessels.
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1.Oxygen 2.Nutrients 3. Carbon-dioxide 4.Pumps 5.Arteries 6.Veins 7.Valves 8.Capillaries 9.Absorption & Excretion
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