define heart for five mark
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The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, as well as assisting in the removal of metabolic wastes. In humans, the heart is located between the lungs, in the middle compartment of the chest.
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- heart have 2 auricles as well as 2 ventricles .
- it is pumping organ of our body
- it pass deoxygenated blood to lung and oxygenated blood to all parts of body..
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