organisation in animals

• name the five levels of organisation in living organisms

  1. cells
  2. tissues
  3. organs
  4. organs systems
  5. organisms
• what is a tissue?

  a group of cells with similar structures and functions
• what is an organ?

  A group of tissues that work together to perform a specific function in the body.
• what is the function of bile in digestion?

  neutralises hydrochloric acid from the stomach
• what is the function of saliva in digestion?

  lubrication to help swallowing
• name three enzymes produced in the pancreas

  1. amylase
  2. protease
  3. lipase
• name the four main components of blood

  1. red blood cells
  2. white blood cells
  3. plasma
  4. platelets
• name two substances transported in the blood plasma

  1. glucose
  2. hormones
• how does the structure of an artery relate to its function?

  has elasticated walls that can stretch
• what is the function of an Artery?

  carries blood Away from the heart
• what is the function of a veIN?


  carries blood IN to the heart at low pressure
• what is the function of a capillary?

  carries blood to cells and tissues
• list the structures air passes through when breathing in

  1. mouth/nose
  2. trachea
  3. bronchi
  4. bronchioles
  5. alveoli