Respiratory system

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  • Respiratory system
    • Responses
      • Increased rate and depth of breathing
      • Increased gas exchange
      • Increased ventilation rate
      • Short-term change as a result of exercise
    • Adaptations
      • Alveoli more efficient- more capillaries and more elastic
      • Musculature of torso= stronger and more efficient
      • Lung volume increases- greater volume of air breathed out
      • Long-term change as a result of exercise
      • Slightly larger lung volume
      • Faster recovery, better O2 recovery, better lactic acid removal, less DOMS
      • More air breathed per minute
      • Bette pulmonary blood network- better blood flow
    • Oxyaemoglobin curve
      • Gaseous exchange more efficient= more O2 to muscles
      • Shifts down and to the right during exercise
        • Bohrs shift
    • Gas transport
      • Diffiusion
        • Movement of molecule from a region of high to low concentration along a gradient
        • O2 diffuses from alveoli wall to red blood cells- haemoglobin
        • CO2 works in other way to O2
      • Breath air through nose to- moisten air, filter air, warm air
    • Inspiration (breathing in
      • external intercostal muscles and diaphragm contract
      • internal intercostal muscles relax
      • Increased volume of thorax
    • Expiration
      • External intercostal muscles and diaphragm relax
      • Internal intercostal muscles contract
      • Decreased volume of thorax
      • Air forced out more rapidly


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