Digestive system
- Created by: Ellie Rivers
- Created on: 01-04-13 12:02
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- The Digestive System
- oesophagus
- adapted for transport
- thick muscular wall
- Stomach
- muscular sac
- produces enzymes that digest proteins
- produces mucus to stop enzymes digesting the stomach
- small intestine
- long muscular tube
- walls contain villi and microvilli to increase surface area
- large intestine
- absorbs water
- food becomes drier and forms faeces
- rectum
- stores the faeces
- salivary glands
- secrete amylase to break down starch
- pancreas
- produces pancreatic juices
- digests proteins, lipids and starch
- digestion
- Physical breakdown
- broken down by teeth to provide a large surface area
- also broken down by the stomach churning
- Chemical breakdown
- carried out by enzymes
- all function by hydrolysis
- the enzyme splits the molecule into smaller pieces so they can be hydrolysed
- carried out by enzymes
- Physical breakdown
- oesophagus
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