respiratory system

• primary functions of respiratory system

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• primary functions of respiratory system

  • large area for gas exchange +
  • move air to and from lungs+
  • produce sounds +
  • detection of odours in superior section
• organs of the upper respiratory system

  • Nose+
  • Nasal cavity +
  • Paranasal sinuses +
  • Pharynx

  
• function of larynx 


  protects the glottis
• external respiration 


  occurs in lungs +

  oxygen out of lungs, co2 in
• internal respiration 


  occurs in cells +

  oxygen in and co2 out
• actions used to breath

  Inhalation: Diaphram contracts external intercostals +

  exhalation: Elastic recoil of chest and diaphram relaxes
• function of haemoglobin 


  carry gases to cells and gasses can disolve directly in blood
• age related changes in respiratory system

  muscles loose their ability ot keep airways open