air sac   (TTS Sound)

The air_sac has 3 Senses.

• air cell, alveolus, air sac
• 肺胞
• a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
• 肺で空気を保つための小さい嚢

• air sac
• any of the thin-walled extensions of the tracheae of insects
• 昆虫の気管の薄壁で囲まれ拡大したもの総称

• air sac
• any of the membranous air-filled extensions of the lungs of birds
• 鳥の肺の膜質の空気の詰まった延長部分