一、通气——血流 1、正常肺泡每分通气量及血流量,肺尖与肺底是不同的。通气量肺尖为0.24升/分,肺底为0.84升/分,肺尖比肺底约为1/3。因胸膜腔负压肺尖(-10cmH_2O)比肺底(-2.5cmH_2O)大,导致肺尖的肺容量比肺底大。而肺的顺应性则肺容量大的反不如肺容量小的好,故通气量肺尖不如肺 First, ventilation - blood flow 1, normal alveolar ventilation and blood flow per minute, apex and the bottom of the lung is different. Ventilation apex of 0.24 l / min, the bottom of the lung is 0.84 l / min, lung apex is about 1/3 than the lung. Due to negative pressure in the pleural cavity apex (-10cmH_2O) than the bottom of the lung (-2.5cmH_2O) large, leading to lung apex lung capacity greater than the lung. The compliance of the lungs is not as good as the capacity of the lungs, lung capacity is good, so the lungs lung ventilation is not as good as the lungs