human digestive system

• digestive system:

  • breaks down (digest) food
  • absorbs food
• glands:

  • salivary glands and pancreas
  • produce digestive juices - contain enzymes
• stomach:

  • hydrochloric acid - strong acid
  • acid kills bacteria
  • optimum pH for protease
• small intestine:

  • soluble molecules absorbed into blood
• liver:

  • produces bile - helps the digestion of lipids
  • bile stored in the gall bladder
• large intestine:

  • absorbs water from undigested food
  • produces faeces - passes out the bosy through rectum and anus
• bile:

  • produced in liver
  • stored in gall bladder
  • released in small intestine
  • alkaline - neutralizes hcl for enzymes
  • breaks down large drops of fat into small ones - emulsifies it
  • large s.a. allows for a faster breaking down by lipase