title: The ultrastructure of the avian muscle spindle.
mesh_terms: D000818:Animals; D002645:Chickens; D004847:Epithelial Cells; D008854:Microscopy, Electron; D008928:Mitochondria; D009470:Muscle Spindles / Q000166:cytology*; D009210:Myofibrils; D011563:Psittaciformes