Week 7

I found out that there are 2 types of digestions - Physical digestion and Chemical digestion

• Physical Digestion

  Your teeth help to break big pieces of food physically into smaller pieces.The physical breakdown of food into smaller pieces without any chemical change to the molecules of the food is called physical digestion.Smaller pieces of food have a larger surface area compared to a big piece of food.

• Chemical Digestion

Chemical digestion is the breakdown of large food molecules into smaller molecules. The enzymes speed up specific chemical reactions in the body. Enzymes are special proteins produced by the body.Saliva contains enzymes which speeds up the breakdown of the large food molecules into smaller food molecules.