Fine structural differences in "fast" and "slow" muscle fibers of the crab.
D000818:Animals; D001369:Axons; D002454:Cell Differentiation; D003445:Crustacea / Q000166:cytology*; D008854:Microscopy, Electron; D008931:Mitochondria, Muscle; D009132:Muscles / Q000166:cytology*; D009210:Myofibrils; D009411:Nerve Endings; D012583:Schwann Cells