Sandwich
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- the Sandwich is going to be picked up and pit into a mouth! He is ingested. The teeth break down the sandwich into smaller bits to be swallowed. Saliva produced by the salivary glands are going to loosen up the the food. The enzyme in the saliva is called amylase and breaks down starch in the bread.
- It enters the stomach and stays there for approximately 4 hours! The stomach helps to break down Sandwich. Gastric juice is produced by glands in the walls. The juice is mostly hydrochloric acid which kills microorganisms. Protease helps break down the protein in the ham and cheese.
- In the small intestine the sandwich is broken down by more enzymes! Amylase breaks down starch in the Bread, lipase breaks down fats in Cho Cheese and protease breaks down protein in Cho Cheese and Harry Ham. The acid is neutralised by pancreatic juice and bile which come from the liver and pancreas. Most of Sammy's nutrients are absorbed into the blood.
- The Sandwich slides down the oesophagus into the stomach. A wave of contraction passes along the oesophagus pushing the sandwich forward. The wave of contraction is called peristalsis.
- Sandwich enters the large intestine. The large intestine absorbs most of the water from the sandwich into the blood. Some bacteria in the large intestine can use the remains of the Sandwich to make some vitamins the body needs.
- Finally the remains of the Sandwich that have not been absorbed into the cells of the body reach the rectum. The rectum stores the Sandwich before being egested from the body.
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