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The molecules in the digestive system break down primarily due to the action of enzymes, which are specialized proteins that catalyze biochemical reactions. These enzymes, produced by the salivary glands, stomach, pancreas, and intestines, target specific macromolecules like carbohydrates, proteins, and fats, breaking them into smaller molecules. Additionally, the acidic environment of the stomach and mechanical processes such as chewing and churning aid in this breakdown, facilitating nutrient absorption in the intestines. Overall, the combination of enzymatic action and physical processes ensures efficient digestion and nutrient extraction.

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2mo ago

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