Comparative quantitative morphology of the mammalian lung: trachea.

摘要: Abstract Measurements of trachea! dimensions in a variety mammals, covering the extremes body size, indicate that tracheal length is nearly proportional to M0.27, and radius M0.39. The ratio ventilation cross-sectional area trachea constant for all species, hence average linear flow velocity same mammals. Assuming dead space volume volume, was found be M1.05, other words, it both tidal total pulmonary capacity; since respiratory frequency M−0.28, computed M0.78, hence, expired ventilation. From this may inferred alveolar metabolic CO2 production mammals thus PCO2, Similarly, oxygen consumption, PO2 will also at sea level.