[Capillarization of the muscular tissue of the Black Sea dolphin Phocaena phocaena].

Studies have been made on morphological and diffusion parameters of capillaries in cardiac and skeletal muscles of the dolphin P. phocaena. As compared to that in terrestrial mammals, the degree of capillarization of muscle tissue in the dolphin was found to be higher. Higher density of capillaries, as well as shorter radii of diffusion and smaller volumes of tissue cylinders, are responsible for more intensive supply of oxygen per tissue volume unit in dolphins.