TY - JOUR ID - 6083 TI - Histological study of liver in Dhub lizard Uromastyx aegyptius microlepis (Blanford, 1874) during the period of hibernation JO - Caspian Journal of Environmental Sciences JA - CJES LA - en SN - 1735-3033 AU - Jawad, Jasim Mohammed AU - Faraj, Saddama Saed AD - Baghdad College High School, Baghdad, Iraq AD - College of Education for Pure Sciences (Ibn Al-Haytham), Iraq Y1 - 2022 PY - 2022 VL - 20 IS - 5 SP - 1091 EP - 1097 KW - Liver KW - Dhub lizard KW - Uromastyx aegyptius microlepis KW - Hibernation DO - 10.22124/cjes.2022.6083 N2 - The Iraqi dhub-lizard enters the hibernation when the temperature decreases in the winter. During this period, light microscopic analysis showed that the hepatic tissue is surrounded by a thin capsule composed mainly of collagen fibres. Trabeculae extended from this capsule towards the parenchyma were restricted to the subcapsular region and the liver tissue had no clear lobulation.  Hepatocytes were arranged into one or two cell thick cords or acini contained three to five cells.  Hepatocytes were polyhedral, oval and pyramidal in shape, and some of these cells demonstrated degenerative changes. Sinusoids appeared either as narrow irregular shape channels separating the hepatic cords with two layers of cells or wide channels separating the cords with one layer of cells. At the beginning of hibernation, application of the PAS technique revealed that glycogen granules spread heterogeneously within the hepatocyte cytoplasm and appeared dark pink in colour while at the end of hibernation these granules decreased in quantity and appeared light pink in colour. Large quantities of various-sized melano-macrophage aggregations were present in the liver tissue. The liver contained a very dense vascular system represented by the vessels of portal areas, the central veins, and the presence of hematopoietic tissue.   UR - https://cjes.guilan.ac.ir/article_6083.html L1 - https://cjes.guilan.ac.ir/article_6083_1c39d3ed73a3215baa15b86ebd61b6a0.pdf ER -