Final answer:
Mechanical digestion occurs in the mouth and stomach, while chemical digestion occurs mainly in the small intestine.
Step-by-step explanation:
Mechanical digestion is the physical breakdown of chunks of food into smaller pieces.
This type of digestion takes place mainly in the mouth and stomach.
Chemical digestion is the chemical breakdown (bonds are broken) of large, complex food molecules into smaller, simpler nutrient molecules that can be absorbed by body fluids (blood or lymph).
This type of digestion begins in the mouth and continues in the stomach but occurs mainly in the small intestine.