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| a large dark-red oval organ on the left side of the body between the stomach and the diaphragm; produces cells involved in immune responses | ||||
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| large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes |