Enzymes and Digestion.
The enzymes in respiration work inside cells. Various different enzymes work in digestion too but these enzymes are produced by specialised cells and then released into the gut to mix with the food.
Digestive Enzymes Break Down Big Molecules into Smaller Ones.
1) Starch, proteins and fats are big molecules. They are too big to pass through the walls of the digestive system.
2) Sugars, amino acids, glycerol and fatty acids are much smaller molecules. They can pass easily though the walls of the digestive system.
3) The digestive enzymes break down the big molecules into the smaller ones.
AMYLASE Converts Starch into Simple Sugars: