[A comparative electron microscopic study of the peripheral blood leukocytes of vertebrates].

The ultrastructure of leukocytes of the peripheral blood was studied in representatives of classes of fishes (Cyprinus carpio), amphibia (Rana redibunda, Bufo bufo), reptiles (Testudo horshfield), birds (Columba livia) and mammals (Rattus norvegicus). The granules are characterized by homogeneous or heterogeneous matrix. The granules of special leukocytes (turtle) and pseudoesinophils (pigeon) have larger dimensions than those in neutrophils of other animals. The matrix of the eosinophil granules of the carp and rat contain crystalloid structures while the granules of eosinophils of amphibia, turtles and pigeons are characterized by electron dense homogeneous matrix. The basophil granules are larger and in addition to homogeneous or fine granular structure (turtle, pigeon, rat) have lamellar structure (Cyprinus carpio, frog, toad). The ultrastructural organization of agranulocytes and plasma cells of the animals studied is also described.