organisation

• mesophyll tissue is the site of photosynthesis and contains chloroplasts
• epithelial tissue covers exposed parts of the plant or body
• epidermal tissue is the outer layer of the leaf and human skin
• muscle tissue contracts to bring force and motion
• glandular tissue produces digestive juices that break down the stomachs contents
• the liver produces bile
• the pancreas produces enzymes
• saliva glands produce a watery fluid that contains enzymes and antibacterial substances
• the small intestine is the site of digestion and absorption of nutrients
• Proteins are broken down by

  protease
• Protease is found in 


  the stomach, the pancreas and the small intestine
• Protease converts proteins 


  back into individual amino acids which are then absorbed into the bloodstream
• Carbohydrates are broken down by

  carbohydrase or amylase
• amylase breaks down starch

  into maltose - simple sugar
• Amylase is found in 


  saliva and pancreatic fluid
• Lipids are broken down by

  lipase
• Lipase is found in

  pancreatic fluid and the small intensine
• Lipids contain a molecule of glycerol


  attached too three molecules of fatty acids
• Bile is made in the

  liver and stored in the gull bladder
• Bile 


  speeds up digestion of lipids
• Bile converts

  large lipid droplets into small droplets
• Bile increases

  the surface area of lipid droplets
• Bile is an alkaline

  it neutralizes stomach acids