Digestion Y8

• Break down of Proteins


  Amino acids
• Break down of Fats

  Fatty acids
• Malnutrition


  Lack of a balanced diet leading to being underweight or obese
• Anaemia


  Lack of iron due to poor oral intake
• Digestion summary


  1. Food broken down in mouth mechanically by chewing and chemically by saliva becoming a bolus

  2. Bolus enters oesophagus and is pushed down to stomach by peristalsis

  3. In stomach, food is churned and passed to small intestine

  4. Indigestible food is passed to large intestine

  5. Water absorbed and faeces passed to rectum

  6. Faeces leaves body through anus via egestion
• Energy transferred = (Energy transferred / Energy available) x 100
• Break down of Carbohydrates

  Starch
• Adaptations of the small intestine

  Thin wall so short distance for nutrients to pass through

  Many tiny villi to increase surface area

  Has a good blood supply to carry nutrients around the body
• Mineral important for healthy red blood cells

  Iron
• Nutrient important for healthy digestive system 


  Fibre
• Two food groups you should base your diet on

  Carbohydrates & Proteins