how would you compare and contrast mechanical and chemical digestion?
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how would you compare and contrast mechanical and chemical digestion?
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Mechanical digestion involves physical movement to make foods smaller. Chemical digestion uses enzymes to break down food.
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Mechanical digestion
Mechanical digestion begins in your mouth with chewing, then moves to churning in the stomach and segmentation in the small intestine. Peristalsis is also part of mechanical digestion. This refers to involuntary contractions and relaxations of the muscles of your esophagus, stomach, and intestines to break down food and move it through your digestive system.
Chemical digestion
Chemical digestion involves the secretions of enzymes throughout your digestive tract. These enzymes break the chemical bonds that hold food particles together. This allows food to be broken down into small, digestible parts.