ventilation in mammals/fish/insects

Cards (8)

  • describe the events of inhalation in humans.

    External intercoastal and diaphragm muscles contract.
    ribcage moves up and out
    diaphragm flattens, which increases vol of the thorax cavity
    the pressure in the lungs decreases
    air moves into lungs
    (energy is required)
  • describe the events of exhalation in humans.

    External intercoastal and diaphragm muscles relax.
    ribcage moves down and in
    diaphragm becomes curved again
    the volume of thorax cavity decreases
    pressure within lungs increases
    air is forced out of lungs
    (passive process but can be forced, so would require energy)
  • define tidal volume
    the volume of air you can inhale and exhale per breath
  • define vital capacity
    the maximum volume of air that can be breathed in or out
  • define breathing rate
    how many breaths are taken per min
  • define oxygen consumption
    volume of oxygen used up by someone in a given time
  • define residual volume
    a small amount of air that always retained in the lungs even after forced exhalation
  • define total lung capacity
    the maximum volume of air the lungs can hold