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either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine
organ where water is absorbed from the food and taken into the blood stream. prepares undigested food for elimination from body
the central organ of the respiratory system in which oxygen from the air is exchanged with carbon dioxide from the blood
organ under the stomach; produces insulin (for transport of sugar into cells) and enzymes (for digestion of foods)
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