Respiratory system depends on what key processes
external respiration, gas transportation via blood, internal respiration
external respiration consists of
pulmonary ventilation and pulmonary diffusion
internal respiration consists of
capillary diffusion
transport and exchange zones of air
nose and mouth, nasal conchae, pharynx, larynx, trachea, bronchial tree, alveoli
lungs are suspended in ___
pleural sacs
___ lines the thoracic wall
parietal pleura
___ is fixed to the lungs
visceral pleura
what muscles are involved in inspiration
diaphragm flattens, external intercostals expand rib cage and shift sternum up
inspiration causes ___ and ___ to expand
thoracic, lung volume
as lung volume increases, ____ pressure decreases
intrapulmonary
pressure and volume of a gas is __ proportional
inversely
expiration is typically a __ process
passive
during inspiration and expiration, ____ pressure changes which enhances ___
intra-abdominal, venous return