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DIGESTION(anna) - Coggle Diagram

- - - - 3.shape of food substance must fit into active site of enzymes .e.g lock and key model
        
        hence each enzyme only break down one type of food
        
        4.food substance which enzyme acts on is substrate
        
        remain unchanged after the digestion of food
  - - - where
        
        mouth
        
        stomach
        
        small intestine
        
        lipase
        
        fats-glycerol+fatty acids
        
        1 more item...
        
        maltose
        
        1 more item...
        
        proteases
        
        proteins-amino acids
        
        salivary amylase
        
        starch-maltose
- - - - carbon,hydrogen,oxygen
  - - - carbon,
        hydrogen,oxygen,nitrogen,surplus, phosphorus
  - - - carbon,hydrogen,oxygen
- - - - it start from the mouth and ends at the anus
- - - - WHY?
        
        1.large complex substances cannot pass through the small intestine walls
        
        2.when broken down they can move through the intestinal wall
        
        3.entering the bloodstream,transporting to all parts of the body
      - physical digestion
        
        physical breakdown of large pieces of food into small pieces
        
        food substances identities remain unchanged ,no new product formed
        
        WHY?
        
        to increase surface area
        
        WHERE
        
        mouth:chewing action
        
        stomach:churning action
        
        1 more item...
      - chemical digestion
        
        large molecules broken down into smalle,simple molecules by enzymes
        
        food substance identities change,new product formed
        
        why? Allow food substances enter blood through intestinal walls
- - - - physical digestion bile produced by liver ,stored in gall bladder
        
        is released into small intestine whe fats reach region
        
        bile not enzyme,is substance to break up fat molecules into fat globules
        
        process is call emulsification
      - chemical digestion the pancreas secretes pancreatic juice ,small intestine secretes intestinal juice
- - - - this type of movement is called peristalsis
        
        the food present is called bolus
- - - - the final products of digestion:glucose,amino acids,fatty acids, glycerol
        
        enter bloodstream small intestine walls
        
        to allow the absorption of food quickly
      - 4.food substances enter bloodstream through diffusion or active transport
- - - - solidwaste:faeces stored in rectum temporarily
        
        is expelled through the anus by process called egestion
- - - - 2.bacteria present in unhygienic food cause infections in intestine or produce toxin
        
        3.symptoms of it may take few h or few days to appear
        
        to avoid food borne diseases,food products handled in hygienic way,stored properly