Lungs (4)

• Respiratory muscles for exhalation


  • Internal intercostals
  • Diaphragm
• Thorax increase


  • Vertical
  • Downward motion
  • Transverse
  • Anterioposterior
• Inspiratory capacity


  Tidal volume + inspiratory reserve volume
• Functional residue capacity (FRC)


  Expiratory reserve volume + residual volume
• Vital capacity (maximum usable air)


  Expiratory reserve volume + tidal volume + inspiratory reserve volume