表皮内突
Apodeme \Ap"o*deme\, n. [Pref. apo- + Gr. ? body.] (Zo["o]l.) One of the processes of the shell which project inwards and unite with one another, in the thorax of many Crustacea.
apodeme n : ridge-like ingrowth of the exoskeleton of an arthropod that supports internal organs and provides attachment points for muscles