【Its science-】評論

Primary emphysema does not occur in animals, and thus no animal disease should be called simply emphysema In animals, this lesion is always secondary to obstruction of outflow of air or is agonal at slaughter.Interstitial emphysema occurs mainly in cattle, presumably because of their wide interlobular septa, and lack of collateral ventilation in these species does not permit air to move freely into adjacent pulmonary lobules. As a result, accumulated air penetrates the alveolar and bronchiolar walls and forces its way into the interlobular connective tissue, causing notable distention of the ...