気き胞ほう

noun

bladder; vesicle

Biological term for a small fluid-filled sac or cavity, such as a swim bladder in fish or a vesicle in cells.

• 魚さかなの気き胞ほうは浮ふ力りょくを調ちょう節せつする役やく割わりを持もつ。

  The swim bladder of fish has the role of regulating buoyancy.