(本文接第三期)1 1.呼吸道的死角一解剖死腔:死腔是指没有功能作用的空腔。呼吸解剖死腔指呼吸过程中口腔至肺泡之间的空腔,包括口腔、气管、支气管。吸气时解剖死腔内的气体无法参与肺泡气体交换,在呼气时这部分气体原封不动地排出体外。因此,可以将解剖死腔的气体视为无效呼吸。成人的解剖死腔约为150毫升,每次呼吸 (This article then the third period) 1 1. Respiratory dead-anatomy dead space: dead space refers to no functional role of the cavity. Respiratory anatomy refers to the dead space between the mouth and the alveoli in the process of breathing, including the mouth, trachea and bronchi. Inspiratory dead air when the gas can not participate in alveolar gas exchange, this part of the gas exhaled intact in the exhaled body. Therefore, it is possible to treat the dead space gas as ineffective breathing. The anatomical dead space for adults is about 150 ml, each time breathing