Physical and Chemical Digestion

Physical digestion- Increases the surface area of the food.

• Mechanically tearing up large food items into smaller pieces.
• (No chemical reactions take place.)

• Cutting up food, biting, chewing, churning, emulsification

Chemical digestion

• Using enzymes to break up small items of food into simple, individual molecules.
• (Chemical reactions take place.)

enzymes

Polymer ------------------Monomer