[Structural characteristics and innervation of the aortic wall in roosters]

The structural characteristics and inervation of the aortic wall of domestic cooks was examined on fresh material from 20 species. The author examined the basic structural elements of the aortic wall by means of histological and impregnation methods. There were regional difference and peculiarities in the structure of the wall. In its larger part the aorta was described as a blood vessel of elastic type and only in the abdominal region was characterized as a blood vessel of transitory type. There were close interrelationships between the elastic membranes and smooth cells. Data were reported on the inervation and partly on vascularization of the aortic wall. Recertor formations and neuro-cellular accumulations were discribed. An important element in the inervation of the aorta was the efferent nerve fibers, having attitude to the smooth muscle component and intramural vascular bed. The obtained results give an idea on the dependence and connection between structure, inervation and to a certain degree of vascularization.