title: Ultrastructural aspects of the capsular cells in frog muscle spindle.
mesh_terms: D000818:Animals; D005613:Freeze Etching; D005614:Freeze Fracturing; D008854:Microscopy, Electron; D009470:Muscle Spindles / Q000166:cytology / Q000648:ultrastructure*; D011892:Rana catesbeiana / Q000033:anatomy & histology*