Bisoniana LXXIV. Morphology of the pancreas in the European bison

Pytel, S.; Wojnowska, M.

doi:10.4098/at.arch.80-13

Cited by 2 publications

(2 citation statements)

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“…Although more than 100 original studies have been published focusing on the morphological structure of organ systems in the European bison [ 1 , 2 ], few of them have analysed the endocrine glands in this species. Existing reports describe the morphology of the pancreas [ 3 ], thyroid gland [ 4 – 6 ] and thymus [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

The morphology of the adrenal gland in the European bison (Bison bonasus)

et al. 2016

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BackgroundThe anatomy of the adrenal glands has been widely studied in many species of domestic and wild mammals. However, there are no available literature reports describing the morphology and morphometry of the adrenal glands of the European bison (Bison bonasus).ResultsThe study was conducted on 97 European bison of both sexes. The growth of the adrenal glands corresponded to the growth of the whole body, with the largest increase in size occurring in the first 2 years of the animal’s life, followed by a slower increase in size until the animal was 5–7 years old. There were no statistically significant differences between ipsilateral adrenal glands of males and females with respect to age. There was no statistically significant difference in weight between the left and the right adrenal gland. However, there was a difference in the length, width and thickness of the two glands. Reference intervals for adrenal gland size and weight were computed separately for two bison age groups (up to 2 years of age and older than two years). The adrenal gland consisted of a cortex and a medulla. The connective-tissue capsule contained two layers. It had a fibrous structure and abundant adipose tissue. The cortex was divided into three zones. The zona glomerulosa contained cells arranged in bundles and curves. Numerous apoptotic cells were observed among regular cells in the zona reticularis. There were vacuoles in the cells of both zona fasciculata and zona reticularis, which formed a foamy cytoplasm. The adrenal medulla was composed of large, dark cells with a highly basophilic cytoplasm in the superficial region and of smaller, lighter cells in deeper layers. Sinusoidal vessels were located in the central part of the medulla.ConclusionsThe left adrenal gland was significantly longer, narrower and thinner than the right one. There were no significant differences in the structure of the adrenal medulla and cortex of the European bison compared to other species of domestic and wild mammals. There was a thick layer of adipose cells at numerous locations in the adrenal capsule of the bison.Electronic supplementary materialThe online version of this article (doi:10.1186/s12917-016-0783-8) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

The morphology of the adrenal gland in the European bison (Bison bonasus)

et al. 2016

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“…Szczególne miejsce w tym obszarze zajmuje rozród, który warunkuje trwanie i rozwój populacji. Pomimo że oryginalne opracowania morfologiczne poszczególnych układów oraz narządów żubra zawarte są w ponad 100 pozycjach piśmiennictwa, to narządom układu moczowo-płciowego poświęcono nieliczne prace (1,6,7,10,12,15,(17)(18)(19)(20). Na uwagę zasługuje fakt, iż morfologia narządów płciowych żeńskich wspomnianego gatunku, poza krótkimi wzmiankami, nie została szczegółowo opracowana (13).…”

Section: Praca Oryginalnaunclassified

Histological and morphometric study of the uterus of the lowland bison

Olbrych¹,

Barszcz²,

Bartyzel³

et al. 2017

Medycyna Weterynaryjna

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Histological and morphometric study of the uterus of the lowland bison SummaryThe European bison belongs to endangered species. Its restitution requires a complete knowledge of the structure and function of its genital organs. The aim of this study was a histological and morphometric examination of the uterus of immature and adult females. Material for the study came from 55 females living in the Białowieża Forest. According to the Polish law, the post mortem use of tissues does not require an approval from an ethics committee. The animals were divided into 2 groups: group I included 36 prepubertal females aged from 2 months to 1.5 years, while group II consisted of 19 sexually mature females aged 2 to 20 years. The samples were stained with haematoxylin and eosin (H&E). Histological and morphometric examinations included measurements of the height of the epithelium, thickness of the endometrium, thickness of the myometrium, thickness of the inner and outer muscular layers, and thickness of the perimetrium. The results were analyzed using the Statistica 12.0™ software. Statistically significant differences were found between the two groups in all morphometric parameters examined. The results revealed a high degree of similarity of the histological structure of the uterus between European bison and domestic cattle.

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Bisoniana LXXIV. Morphology of the pancreas in the European bison

Cited by 2 publications

References 5 publications

The morphology of the adrenal gland in the European bison (Bison bonasus)

The morphology of the adrenal gland in the European bison (Bison bonasus)

Histological and morphometric study of the uterus of the lowland bison

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