The different parts of the digestive system are as follows:
1. Digestion starts in the mouth, where teeth chew the food and saliva changes starch into sugar.
2. The food moves through the oesophagus to the stomach.
3. In the stomach, food is mixed and churned. Digestive juices break down proteins, acid kills germs, and mucus protects the stomach.
4. The food then goes to the small intestine, where juices from the liver, pancreas, and the intestine digest fats, proteins, and carbohydrates.
5. The inner lining of the small intestine has finger-like projections that absorbs the digested nutrients into the blood.
6. The leftover food moves to the large intestine, where water and salts are absorbed.
7. The solid waste (stool) is stored in the rectum and passed out through the anus. This process is called egestion.