[Ultrastructure of the cross-striated muscles of the rat esophagus in normal conditions and during increased functional load].
The muscular coat of the rat esophagus in health consists of a homogenous population of cross-striated muscle fibers having moderate succinate dehydrogenase activity and ultramicroscopic signs characteristic of both red and white myons of skeletal muscles. Experimentally induced functional loads of the esophagus lead to structural changes in the muscles. Initially occurring signs of injury are replaced by the development of muscle hypertrophy. It has been also found that cross-striated muscles of the esophagus are capable of myosatellitogenesis and segregation of nucleosarcoplasmic areas. Longitudinal splitting of muscle fibers was observed in some cases.
D000818:Animals; D004947:Esophagus / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000648:ultrastructure*; D051381:Rats; D013312:Stress, Physiological / Q000473:pathology*
Ul'trastruktura poperechnopolosatykh myshts pishchevoda krys v norme i pri povyshennoĭ funktsional'noĭ nagruzke.