B4 Digestive system and enzymes

• Cell?

  basic building block of living organism
• Tissue?

  group of cells with similar structure and function
• Organ?

  group of tissues working together to perform a specific function
• Organ system?

  group of organs working together to perform a specific function
• Digestive system function?

  digest food and absorb nutrients
• Pancreas function?

  produce enzymes amylase
• Saliva function?

  lubrication to help swallowing. contains amylase to break down starch
• Four components of blood?

  1. red blood cells 2. white blood cells 3. plasma 4. platelets
• Platelets function?

  form blood clots. prevent the loss of blood and stop wounds becoming infected.
• Stomach function?

  produce hydrochloric acid to kill bacteria and provide right environment for protease enzyme to work
• Small intestine function?

  where soluble food molecules are absorbed by blood stream
• Liver function?

  produces bile (stored in gall bladder) to help digest fats (lipids) and allows lipase enzyme to work
• Large intestine function?

  absorb water from undigested food
• Role of enzymes?

  biological catalysts (speed up biological reactions like the breakdown of food) without being used up