Y7 Life 07 parts of diet


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Y7 Life 07 parts of diet

  1. 1. Diet and Digestion <ul><li>Learning Objectives : </li></ul><ul><li>To understand the main parts of the human diet. </li></ul><ul><li>Starter : </li></ul><ul><li>What did you have to eat yesterday? </li></ul><ul><li>Is what you have eaten good for you? </li></ul>
  2. 2. Why do we need a balanced diet? <ul><li>Food provides us with the energy and materials required for: </li></ul><ul><ul><li>growth </li></ul></ul><ul><ul><li>development </li></ul></ul><ul><ul><li>repair </li></ul></ul><ul><ul><li>reproduction </li></ul></ul>
  3. 3. What is a balanced diet? <ul><li>We need the right amounts of nutrients in balance to maintain good health and organ functions. </li></ul><ul><li>Food provides us with energy to: </li></ul><ul><ul><li>maintain healthy weight </li></ul></ul><ul><ul><li>have a strong immune system </li></ul></ul><ul><ul><li>be healthy enough to work and learn </li></ul></ul><ul><ul><li>be happy </li></ul></ul>
  4. 4. The Seven Food Groups
  5. 5. Carbohydrates Water Protein Vitamins Minerals Fibre Fats
  6. 6. Nutrient Role in Body Examples Carbohydrates Lipids Proteins Vitamins Minerals Fibre Water
  7. 7. Carbohydrates <ul><li>Carbohydrates give you energy. </li></ul><ul><li>We usually talk about 2 types of carbohydrates: </li></ul><ul><ul><li>simple - sugars </li></ul></ul><ul><ul><li>complex - starch </li></ul></ul>
  8. 8. Lipids (Fats) <ul><li>Used to make cell membranes </li></ul><ul><li>Stored to insulate organs - protection & keeping warm </li></ul><ul><li>Source of energy </li></ul><ul><li>Essential for fat-soluble vitamins (A, D, E) </li></ul><ul><li>Some make prostaglandins & hormones </li></ul><ul><li>Long-chain omega-3 fatty acids in fish oils protect us from heart disease </li></ul>
  9. 9. Proteins <ul><li>Use to make enzymes, hormones, antibodies, haemoglobin, muscles, cells membranes, collagen and elastin in connective tissue, bone. </li></ul><ul><li>Used for growth and repair of tissues. </li></ul>
  10. 10. Vitamins <ul><li>Summary video </li></ul>
  11. 11. Vitamins Role in Body Examples of Foods B group - coenzymes, aid processes eg respiration cereals, wholemeal bread, leafy greens A - dim-light vision, epithelial tissue, immune system liver, green veg, orange fruit & veg C - helps make connective tissue & absorb Fe in food citrus, blackcurrants, kiwi fruit, peppers, potatoes D - helps absorb Ca & deposit it in bones, protects against cancer & heart disease oily fish, eggs, liver, made in skin when exposed to sunlight. A,C,E - antioxidants, protect DNA & against cancer & heart disease E: nuts, wholemeal bread
  12. 12. Minerals Role in Body Examples of Foods Fe - making haemoglobin red meat, spinach Ca - hardens bones & teeth, helps blood clot, nerve conduction, muscle contraction milk, cheese, yoghurt, broccoli Na & K - nerve conduction & heart function Na: table salt K - bananas P - make cell membranes & ATP for bones cheese, pork, tuna, nuts Mg - bones green veg I - thyroxine table salt, seafood Zn - insulin meat, cereals, nuts, milk
  13. 13. Fibre <ul><li>Indigestible plant matter, such as cell walls - adds bulk to food and takes up water in the gut. Helps us pass faeces easily. </li></ul><ul><li>Soluble fibre helps lower blood cholesterol levels </li></ul>
  14. 14. Water <ul><li>Makes up 70% of us - blood plasma is 90% water. </li></ul><ul><li>Needed for transport in the body. </li></ul><ul><li>Needed for sweat, tears and urine. </li></ul>
  15. 15. Superfoods Some foods have been described as super foods, they are rich in several nutrients Suggest why super foods are good for you and what effects they may have?