Removal of metabolic waste from the body.

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Multiple Choice

Removal of metabolic waste from the body.

Explanation:
Excretion is the process by which the body removes metabolic wastes. As cells carry out metabolism, wastes such as urea, uric acid, excess salts, and carbon dioxide are produced and must be eliminated to maintain internal balance. The excretory system—kidneys filtering blood to make urine, lungs exhaling CO2, liver handling nitrogenous waste, and skin sweating out salts and water—handles these removals. Nutrients are substances the body needs, not wastes, and oxygen is used in metabolic reactions rather than being a waste product to be removed. So excretion best describes the removal of metabolic wastes from the body.

Excretion is the process by which the body removes metabolic wastes. As cells carry out metabolism, wastes such as urea, uric acid, excess salts, and carbon dioxide are produced and must be eliminated to maintain internal balance. The excretory system—kidneys filtering blood to make urine, lungs exhaling CO2, liver handling nitrogenous waste, and skin sweating out salts and water—handles these removals. Nutrients are substances the body needs, not wastes, and oxygen is used in metabolic reactions rather than being a waste product to be removed. So excretion best describes the removal of metabolic wastes from the body.

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