Ultrastructural characteristics of the anterior pituitary gland of cattle in the definitive period of postnatal ontogenesis

Today much attention is paid to the study of pituitary ultrastructure laboratory animals and humans. But there not enough available literature most important organ internal secretion productive animal. The aim our work structure cells anterior gland cattle in definitive period postnatal ontogenesis. Histological, morphometric, electron microscopic techniques were used cellular composition cattle. It was revealed that lobe occupies 64 % entire parenchyma, while posterior middle lobes occupy 27% 9%, respectively. After using general histological methods are detected functionally inactive chromophobes (41%) chromophilic cells, which include acidophils (38%) basophils (21%) gland. studies parenchyma let find Somatotropes differ presence a large number secretory granules cytoplasm. Lactotropes less common than somatotropes from them larger granules. Corticotropes, gonadotropes thyrotropes with minimum content least detected. All identified endocrine at different stages functional activity.