title: Studies on the fine structure of the capsular region of tortoise muscle spindles.
mesh_terms: D000818:Animals; D001485:Basement Membrane; D003094:Collagen; D003239:Connective Tissue Cells; D008854:Microscopy, Electron; D008931:Mitochondria, Muscle; D009470:Muscle Spindles / Q000166:cytology*; D009210:Myofibrils; D012508:Sarcolemma; D014426:Turtles / Q000033:anatomy & histology*
chemical_list: D003094:Collagen