Histochemical study of polysaccharides in some arteries of the region of the heart of black vulture (Coragyps atratus)

: A comparative histochemical study of polysaccharides in some arteries of the region of the heart of black vulture was performed. With some exceptions, no variation in polysaccharides composition in all arteries studied were shown. Arterial walls present a sialo-mucopolysaccharidic complex and it is composed of: sialic acid, neutral mucopolysaccharides, hyaluronic acid and chondroitin sulfates. The concentration of these carbohydrates, mainly of the acidic ones, decrease from the inner portions of the media toward the adventitia.