title: Fine structure of the muscular wall of rat pulmonary veins.
mesh_terms: D000818:Animals; D006321:Heart / Q000033:anatomy & histology; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D009130:Muscle, Smooth / Q000033:anatomy & histology*; D009132:Muscles / Q000033:anatomy & histology* / Q000166:cytology; D009431:Neural Conduction; D011667:Pulmonary Veins / Q000033:anatomy & histology*; D051381:Rats