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Human digestive system, Main parts of digestive system - Coggle Diagram

- - - - produces yellowish green fluid called bile
        
        bile
        
        emulsification : fats being broken down into smaller fat droplets. this increases the surface area of fats and allows lipases in the pancreatic and digestive juice to digest fats quickly
        
        fat droplets are broken up by bile into smaller fat droplets
        
        gallbladder : stores bile
        
        bile duct : releases bile into the small intestine
    - - produces pancreatic juice
        
        pancreatic juice contains protease, lipase and amylase
  - - - Digestion of fat : fat is being digested by lipase into fatty acids and glycerol
      - Digestion of starch : starch is being digested by amylase in pancreatic juice into maltose
        then maltose is being digested by maltase in intestinal juice into glucose
      - Digestion of a simpler protein molecule : simpler protein molecule is being digested by protease into amino acids
    - - only small food molecules pass through the wall of the small intestines and blood vessels. the small food molecules then move from the small intestine into the bloodstream. these molecules are then absorbed by cells (respiration cells)