the ontogeny of the gill structure in starlet ( acipenser ruthenus ) was studied histologically from hatching up to 50 days post hatching (dph). based on the obtained results, the first developmental phase of the biological systems in this species was started from hatching with an intense organogenesis and the second phase from 9 dph with the beginning of exogenous feeding. the gill anlage was ...

introduction: in chick embryo, endodermal component of the liver becomes split into 2 diverticula in a short time. the anterior diverticulum lies to the left of the ductus venosus and the posterior one to its right side. as the liver primordium grows, it is invaded by the embryonic veins. based on the different incubation time periods and evolutionary origin of avian species, various times for ...

introduction: the present study used a histological evaluation method to examine the effects of pentoxifylline (ptx) on healing an experimentally-induced pressure sore in a rat model. materials and methods: there were 36 adult male rats used in this study. under general anesthesia and sterile conditions, we used forceps to create one pressure sore on each rat. a double layer of folded skin from...

background: nowadays, there is an increase of meat and animal carcass consumption worldwide. due to the economic value of meat, the likelihood of using unauthorized tissue is possible in meat products. based on these observations, the aim of the present study was to apply morphological method for detection of unauthorized tissues in processed meat products.  methods: in this study, a total of 2...

background: the ostrich is an interesting subject concerninganimal evolution and morphology studies. it has been speculatedthat ostrich eyes would have distinct tissue structures and this hasnot been previously studied in detail. objectives: the aim of thepresent study was to investigate the histology of the outer layer ofthe ostrich. methods: ten mature ostriches were chosen from anostrich bre...

background: primary pancreatic lymphoma (ppl) is a rare condition and its differentiation from most commonly adenocarcinoma is very important because of different prognosis and treatment strategies. the aim of this study was presenting different aspects for differentiating ppl from pancreatic adenocarcinoma. materials andmethods: during 14 months, 5 patients who underwent endoscopic ultrasonogr...

background: to ascertain the effects of tropical leaf meals on semen production and semen quality. objective: this study was conducted with the main objective of investigating the effect of neem leaf meal on physiological responses of rabbit bucks fed graded levels of neem leaf (azadirachta indica a. juss) meal. materials and methods: the varying levels of neem leaf meal (nlm) in the different ...

background and aims. the correlation between morphology of giant cells in peripheral granulomas of the jaws and the aggressive behavior of the lesion is unknown. this study investigated the correlation between the histopathologic features with demographic, gross and radiographic findings in giant cell granulomas. materials and methods. in this analytical study, data from 23 cases of central gia...

in this study, the morphological and histological studies of male and female gonads in mudskipper, periophthalmus waltoni koumans, 1941 from helleh estuary (bushehr province, southwestern iran) were performed to determine its gonadal development stages and histo-morphological characteristics. sampling was done from april 2010 to march 2011 and a total of 81 individuals were collected by hand ne...