发生全肺气肿时，从呼吸性细支气管到肺泡的所有腺泡都丢失了。
Panacinar emphysema occurs with loss of all portions of the acinus from the respiratory bronchiole to the alveoli.
肺为海绵状，由细支气管、呼吸性细支气管和肺泡等构成。
The lung is spongy and consists of bronchioles and respiratorybronchioles and pulmonary alveoli etc.
肺呼吸部肺泡管的数量多，每支呼吸性细支气管分出多条肺泡管，肺泡管宽大；
There are great many alveolar ducts in the respiratory portion. Each respiratory bronchiole branched and formed many generous alveolar ducts.
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