respiratory system

• Respiratory system


  • Made up of: nose + mouth + throat + lungs
  • Responsible for intake of oxygen into the body
• When we begin exercising

  The respiratory system will initiate acute responses to increase the intake of oxygen
• Respiratory rate (RR)


  The number of breaths taken in one minute
• Tidal volume (TV)


  The amount of air that is inspired or expired in one breath
• Ventilation (V)


  The amount of air that is breathed in and out in one minute (V = TV x RR)
• Pulmonary diffusion


  Exchange of oxygen and carbon dioxide between the lungs and the bloodstream
• Exercise starts


  ↑ ventilation -> ↑ pulmonary diffusion
• Resting


  • RR & TV and therefore V are all at resting level
• Submaximal exercise


  • TV and RR increase proportionally with each other -> increases V
• High intensity exercise


  • TV will plateau, beyond this further ↑ ventilation is due to ↑ RR