In general, crabs gills to breathe, gill side at the bottom of the carapace of the gill cavity, but really the land crab gill cavity to expand, shape also changes, such as lung function.

• 一般说，蟹以鳃呼吸，鳃位于背甲侧下方的对鳃腔内，但真陆蟹的鳃腔扩大，形态亦有变化，功能如肺。