The final breakdown of organic molecules occurs in the small intestine during digestion.
Chemical breakdown of organic molecules during digestion occurs in the small intestine. The small intestine is where enzymes break down proteins, carbohydrates, and fats into their simplest forms for absorption into the bloodstream.
Mechanical digestion, on the other hand, occurs in the mouth and stomach, where food is broken down into smaller pieces through chewing and grinding.
Overall, the small intestine plays a crucial role in finalizing the breakdown and absorption of nutrients from food during digestion.
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