The trachea is part of the conducting zone, and it branches into right and left primary bronchi, carrying air to and from the right and left lung, respectively.
气管是传导区的一部分，并且它分支出右和左主支气管，它们运载气体进出相应的肺。
Primary bronchi
原声例句
医学英语词汇基础
英语百科
Bronchus
A bronchus, also known as a main or primary bronchus, is an airway in the respiratory tract that conducts air into the lungs. There is a right bronchus and a left bronchus and these bronchi branch into smaller secondary and tertiary bronchi which branch into smaller tubes, known as bronchioles. No gas exchange takes place in the bronchi.
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