Organisation A

Cards (11)

  • Cells
    Smallest unit of life
  • Organ

    Group of tissues persorming similar functions
  • Organ systems: Made up from several organs that work together to form and function organisms
  • Digestion in gullet / oesohphagus: Muscular tube
    peristalis - wave of muscle contractions forcing food down to stomach
  • Digestion in stomach: Sphinter allows food to enter and squeezes shut to stop food / fluid moving back up
    stomach muscles churn and mix food with acids and enzymes
    acidic environment needed for digestion
  • Liver (digestion): Produces bile - helps digestion of fat - stored in gall bladder
  • Digestion in small intestine: Digested food molecules are absorbed through intestine wall and into bloodstream to be carried around body
    inside wall of small intestine thin with large surface area (villi) - quick and efficient absorption
  • Enzymes: A biological catalyst
    protein with unique and specific shape
  • Carbohydrate digestion: E.g. cereal, potato
    enzyme : amylase
    Made in : small intestine , pancreas
    Product : glucose
    Reaction occurs in : mouth , small intestine
  • Fats and oils digestion: E.g. margarine
    enzyme : lipase
    Made in : small intestine , pancreas
    Product : fatty acids , glycerol
  • Digestion in mouth: Mechanical and chemical digestion
    mechanical - teeth increasing surface area
    enzyme in saliva - amylase - breaks down starch