air sac

• 气囊

英英释义

Noun:

1. a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways

2. any of the thin-walled extensions of the tracheae of insects

3. any of the membranous air-filled extensions of the lungs of birds

近反义词

【近义词】

• alveolus 肺泡
• air cell 气囊