organ systems

• organ system 


  a group of organs that work together to perform a certain function in an organisms body
• digestive system

  • breaks down food into nutrients so that they can be absorbed into the bloodstream to be used for energy, growth and repair
  • any unused materials are discarded as faeces
• circulatory system

  • made up of the heart, arteries, veins and capillaries which are involved in bloody supply
  • arteries carry blood away from the heart and veins carry blood back
  • it carries oxygen, nutrients and hormones to the cells and removes waste products such as carbon dioxide
• the respiratory system

  • made up of the lungs, trachea, larynx, nose, mouth and diaphragm which are involved in gas exchange
  • brings oxygen into the body (inspiration) and sends out carbon dioxide (expiration)
  • protects the airways from harmful substances and irritants
• excretory system

  • removes waste from the body such as water, carbon dioxide, nitrogen and salts
  • crucial in maintaining internal homeostasis
  • regulates the fluid balance of the body, maintaining adequate salt and water levels
• skeletal system

  • gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals
• nervous system

  • transmits signals between the brain and the rest of the body
  • the nervous systems activity controls the ability to move, breathe, see and think