Background and Aim: Glucagon plays a significant role in glucose homeostasis by controlling hepatic glucose output in terms of both hypoglycemic and normoglycemic conditions. This study aimed to determine the amount and intensity of insulin and glucagon in addition to estimating the relationship between α- and β-cells for two animals, camel and buffalo. Materials and Methods: Twenty fresh pancreas samples were collected from 10 buffalo and 10 camel adults immediately after slaughter from AL-Kut abattoir, Al- Kut, Iraq. Hematoxylin and eosin staining technique and the immunohistochemistry technique were used. Results: The histological results, for both animals, showed the cells of the pancreatic islet could be differentiated from the exocrine cells by their paler appearance. The pancreatic islets were round, oval, and irregular shaped. In the camel, the pancreatic islets had a larger diameter than that in the buffalo. The average diameter of β-cells and their percentage was higher than those of the α-cells in the camel. In the buffalo, glucagon-immunoreactive cells were found in abundance with high intensity, whereas insulin-immunoreactive cells were more prominent with high intensity in the camel. In both animals, the α-cells and glucagon-immunoreactive cells were distributed on the peripheries of the pancreatic islets, whereas the β-cells were distributed throughout the pancreatic islets. Conclusion: The study inferences that these differences may be due to the differences in the environment of the animals which affect the structures of body organs.

Aim:This study aimed to distinguish carbon nanotube (CNT) particles and their pathological effects on the liver of birds in areas with carbon emissions.Materials and Methods:Twenty-one domestic ducks were collected from pure farmers and exposed to different sources of air pollution. Histological stains were used to detect the accumulation of carbon particles. In addition, acridine orange/ethidium bromide staining was used to detect apoptosis, and scanning electron microscope (SEM) technique was used to determine the morphological design of carbon particles.Results:Light microscope results showed that the liver sections contain multiwalled CNTs (MWCNTs) which appear as black spots in the hepatic parenchyma. The histopathological changes of parenchyma include sinusoidal dilatation, infiltration, and congestion with frequently high number of macrophages. In general, early destruction of hepatic parenchyma was observed. Moreover, SEM results showed two morphological types of CNTs: The ball-shaped nanoparticles scattered as ultrafine carbon black and fiber form of carbon particles were recognized as MWCNTs in the hepatic tissue. Fluorescence microscopy results showed the early and progressive stages of apoptosis in the hepatic cells of birds in polluted areas, which can be related to the degree and exposure period to pollutants.Conclusion:The study indicates that liver morbidity of birds living in the farms affected by the pollution of brick factories is higher than the birds living in farms affected by the pollution of oil fields.

The study designed to investigate the histological modification of heart tube during the development stage in local domestic rabbits embryo. The experimental animals were distributed into four groups each group consist of one male Rabbit and three female Rabbits. The pregnant female in all groups were sacrificed at the end of each  period. The result showed the early stage of heart development at (4, 6, 8 and 10) days of gestation period, the first embryonic evidence of embryo was the  neural tube formation belong the longitudinal axes of embryo. The result noted the primary divisions  of neural tube in cephalic region of embryo. The result noted at six day of development time showed prominent cardiogenic plate located in limited region called intra embryonic cavity. The micrograph at eight day of heart development showed the heart tube have prominent wide ends, while at ten day noted establishment of primitive heart regions which included the truncus areriosus, bulbo cordis, atrium, ventricle and sinus venosus .