Anatomycal and histological structure of aortic valve in Baikal seal

This article studies peculiarities of the anatomical and histological structure aortic valve cusps in Baikal seal age 3-3.5 years. Topographically, takes a central position is located between atrioventricular valves, cranial - pulmonary valve. Projectively, placed above level but below The ostium has marked sinuses, two coronary one septal, forming bulb. shown by septal right left semilunar cusps. cusp caudally attached to have location. Aortic three layers connective tissue: fibrosa (aortic) – with collagen fibers, ventriculosa (ventricular) elastic spongiosa (intermediate) combination both give strength this structure. thickness ventricular layer 2.4 times higher than layer. At places greatest value, there are transverse resections (2 deep 4 surface), which increase contact surface pressure on cusp. thinning area, before bulging edge cusp, acts as closure point for