Transmission Electron Microscopic Studies on Agranulocytes and Granulocytes of Horse (Equus caballus)

Abstract

The large and medium sized lymphocytes were round and showed comparatively thick and short cytoplasmic processes. The heterochromatin of nucleus was comparatively less than the euchromatin. The small lymphocytes had centrally placed nuclei with huge amount of heterochromatin. The spherical monocyte had heterochromatin and euchromatin distributed in patches. The cytoplasm showed few large and small sized electron dense granules. The neutrophils were roughly round in shape. Population of electron dense granules was comparatively greater than electron- lucent. Eosinophils appeared round to oval in shape with long and narrow cytoplasmic processes. Granules were mostly oval almost of similar in shape and size. The basophils were roughly spherical in outline with few and short cytoplasmic processes. The cytoplasmic granules were extremely large than those of neutrophils and eosinophils and varied from 1.2 µ to 1.9 µ in size.