plz tell me the answer tomorrow is my exam unwanted answers will be reported
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The heart is an organ that pumps blood throughout the body. Human circulatory system is responsible for the transport of materials inside the human body. The organs of the circulatory system are heart, arteries, veins and capillaries. It comprises four chambers:Its u r literature question so we can't help because I haven't read the story
Atria (upper chambers)
Ventricles (lower chambers)
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