air sacs
中文翻譯：
【醫】 肺泡字典網
英文解釋：
名詞 air sac:
- a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways同義詞：alveolus, air sac, air cell
- any of the thin-walled extensions of the tracheae of insects同義詞：air sac
- any of the membranous air-filled extensions of the lungs of birds同義詞：air sac