The human digestive system

In this topic

• Why digestion is needed
• Parts of the digestive tract
• The digestive glands
• Absorption and food hygiene

Key terms

• Digestion
• Enzyme
• Saliva
• Pepsin
• Oesophagus
• Peristalsis
• Duodenum
• Bile
• Pancreas
• Villus
• Absorption
• Gut microflora

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