title: The structure and motor innervation of intrafusal fibres in snakes of Natrix sp.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure; D009045:Motor Endplate / Q000648:ultrastructure; D009046:Motor Neurons / Q000648:ultrastructure*; D009470:Muscle Spindles / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure; D012519:Sarcoplasmic Reticulum / Q000648:ultrastructure; D012911:Snakes / Q000033:anatomy & histology*; D013045:Species Specificity