1. Which of the following organs is primarily responsible for detoxifying harmful substances in the body? a) Liver b) Pancreas c) Spleen d) Gallbladder 2. The process of breaking down food into smaller molecules that can be absorbed by the body is known as: a) Respiration b) Digestion c) Circulation d) Excretion 3. Which of the following is NOT a function of the skeletal system? a) Support b) Protection c) Hormone production d) Blood cell production 4. What is the primary function of red blood cells? a) Fighting infections b) Transporting oxygen c) Clotting blood d) Carrying nutrients

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