| Source/enzyme | Action | |
|---|
| SALIVARY GLANDS | |
| Salivary amylase | Starch → Maltose |
| STOMACH | |
| Pepsin | Proteins → Peptides; autocatalysis |
| PANCREAS | |
| Pancreatic amylase | Starch → Maltose |
| Lipase | Fats → Fatty acids and glycerol |
| Nuclease | Nucleic acids → Nucleotides |
| Trypsin | Proteins → Peptides; zymogen activation |
| Chymotrypsin | Proteins → Peptides |
| Carboxypeptidase | Peptides → Shorter peptides and amino acids |
| SMALL INTESTINE | |
| Aminopeptidase | Peptides → Shorter peptides and amino acids |
| Dipeptidase | Dipeptides → Amino acids |
| Enterokinase | Trypsinogen → Trypsin |
| Nuclease | Nucleic acids → Nucleotides |
| Maltase | Maltose → Glucose |
| Lactase | Lactose → Galactose and glucose |
| Sucrase | Sucrose → Fructose and glucose |