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Leaving Certificate Digestion Practice Test

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Which term correctly describes the process of moving digestion products into the bloodstream?
Correct Answer:
Absorption
Explanation:
Absorption is the process by which nutrients produced by digestion cross the lining of the gut into the bloodstream (and, for fats, into the lymphatic system before joining the blood). In the small intestine, the villi provide a large surface area so nutrients like glucose, amino acids, vitamins, and minerals can cross into capillaries by diffusion or active transport. Fats are mainly absorbed as part of chylomicrons into the lymph, then eventually reach the bloodstream. Ingestion is simply taking food into the mouth, digestion is the breakdown of food into smaller molecules, and egestion is the removal of indigestible waste from the body.

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