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