The Respiratory System

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  • Created by: faske16
  • Created on: 16-10-16 20:54
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  • The Respiratory System
    • During exercise, the body needs to take in a sufficient supply of oxygen and eliminate the carbon dioxide by the working muscles.
      • The harder and longer the physical activity = more oxygen is needed to keep the muscles working.
      • The harder and longer the physical activity = more carbon dioxide is produced.
    • Breathing In = Inhaling
      • 1) The intercosfall muscle contract
        • 2) Chest lifts upwards and outwards
          • 3) Diaphragm tightens and lowers
      • Air from the nose and the mouth is warmed, moistened and filtered
    • Breathing Out = Exhaling
    • How it works
      • 1)Air passes through the Trachea
        • 2) Travels Through the bronchi
          • 3) Passes through the bronchioles
            • 4) Passes into millions of tiny sacs called alveoli
              • 5) Which are surrounded by capillaries
                • 6) Then oxygen passes into the blood
    • Key Terms!
      • Oxygen Debt = Working very hard Means the body needs more oxygen than it can get
      • Gaseous Exchange = Oxygen is breathed in and carbon dioxide is breathed out.
      • Tidal  volume = Amount of air inspired and expired with each normal breath during rest or exercise.
      • Vital Capacity = Greatest amount of air that can be made to pass into and out of the lungs by the most forceful inspiration and      expiration.   (4 to 5 liters approx)


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