Histochemical study of polysaccharides in the aortic arch of some birds

The histochemical study of polysaccharides in the aortic arch of the black vulture, turkey, peking duck, goose and duck, showed that a sialo-mucopolysaccharidic complex is present in the vessel wall and consists of: sialic acid, neutral mucopolysaccharides, hyaluronic acid and Chondrotin sulfate. The concentration of mucopolysaccharides, mainly of the acidic ones, decreases from the inner portions of the media towards the adventicia.