organisation

• Digestion is

  The breaking down of large insoluble molecules into small soluble molecules by enzymes, which are then absorbed into the bloodstream.
• Organisation

  1. Cell 2. Tissue 3. Organ 4. Organ system 5. Organism
• 3 food nutrients

  1. Proteins
  2. Lipids (fats)
  3. Carbohydrates (starch)
• The mouth

  Saliva in the mouth containing enzymes break down starch into small sugar molecules
• Oesophegus

  Food is passed down from the mouth into the stomach
• The stomach

  • Breaking down of proteins
  • Contains hydrochloric acid
  • Churning of stomach muscles
  • Food is broken down into fluid for more space for digestion
• The stomach contains what tissues?

  • Muscle tissues
  • Glandular tissues
• The small intestine

  • Chemicals from liver and pancreas
  • Breaking down of proteins and starch
• The chemicals from the pancreas do what?

  Start the break down of lipids
• The chemicals from the liver do what?

  • Produce bile
• What does bile do?

  • Speeds up the break down of lipids
  • Neutralises stomach acids
• The large intestine

  • Absorbs water into the bloodstream
• Small food molecules are absorbed into the blood stream by..?

  • Diffusion
  • Active transport
• What are muscle tissues and how are they adapted?

  • Muscle cells
  • Contain protein fibres for contraction to increase in size
  • Contains mitochondria for energy