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  • Breathing
    • Expiration (passive= no energy required)
      • Intercostals and diaphragm relax
        • Ribcages moves down and in
          • Thorax volume decreases
            • Lung pressure increases
              • Air forced out
    • Inspiration (requires energy)
      • Intercostals and diaphragm contract
        • Ribcage move up and out
          • Diaphragm flattens, thorax volume increases
            • Lung pressure decrease
              • Air leaves lungs
    • Spirometer
      • Tidal= Volume of air in each normal breath
      • Vital= max volume that can be breather in/out
      • Residual= can't be breathed out


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