B3

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Anerobic respiration occurs when the muscles are woking so hard that the lungs and circulatory system cannot deliver enough oxygen to the body. This often happens when doing sudden exhastive exercise. It takes place in the absence of oxygen and supplies the body very quickly with a small amount of energy: Glucose = Lactic acid Lactic acid is slightly toxic to the body and can harm the cells which causes pain in the muscles, often refered

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