Explain respiratory , excretory and digestion system.
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The excretory system and respiratory system both get rid of waste products. The excretory system disposes of all food not absorbed by the body, and any foods that the digestive system couldn't break down. The respiratory system removes carbon dioxide, a waste product of the cell, from the circulatory system.
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Answer:respiratory system useful for breathing, digestive system useful for digestion, excretory system useful for elimination of excretory products
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