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Digestive system, Mouth, oesophagus and anus are lined with stratified…

- - - - protects cells from being digested by digestive enzymes
    - - loose areolar connective tissue
      - provides elasticity
    - - smooth muscles responsible for movement of food
- - - - Mechanical breakdown
        
        Chemical digestion
        
        Absorption
        
        defecation
        
        indigestible substances are escorted out of the body in poo
        
        nutrients being absorbed from the small intestine into the blood by active and passive transport, to pass the energy into cells
        
        Enzymes are secreted by the liver, pancreas and gallbladder, which break down the chyme into its basic chemical form
        
        Segmentation occurs in small intestines - smooth muscles relax and contract moving chyme back and forth
      - Swallowing
      - Peristalsis (contraction and relaxation of smooth muscles to squeeze food through the lumen)
        
        Occurs in eosophagus, stomach, intestines
    - - mechanical and chemical digestion