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Purpose and Function of the Circulatory System (Fill in the blanks using the terms below.) contracts capillaries oxygen valves exchange arteries veins The function of the circulatory system is to transport. and carry wastes and nutrients to cells away from cells to the organs responsible for eliminating them from the body. The heart is a muscular pump. When the heart it produces pressure on the blood in the circulatory system. This pressure pushes blood through the body. The body travels away from the heart in 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 veins. Arteries and veins are connected by tiny , thin-walled vessels called These very small vessels are of nutrients, wastes, in close contact with the organs and tissues of the body. The oxygen and carbon dioxide occur between tissues and the blood through the walls of these small vessels.
Sagot :
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