Dear colleagues,
The following paper has been published:
S. Vukovic, H. Lucic, A. Zivkovic, M. Duras Gomercic, T. Gomercic, A.
Galov (2010): Histological structure of the adrenal gland of the
bottlenose dolphin (/Tursiops truncatus/) and the striped dolphin
(/Stenella ceruleoalba/) from the Adriatic Sea. Anatomia Histologia
Embryologia. 39. 59-66.
Summary: The structure of the adrenal gland was studied in 11 bottlenose
dolphins (/Tursiops truncatus/), and five striped dolphins (/Stenella
coeruleoalba/). These species are legally protected in Croatia. All
examined animals died of natural causes and were found stranded along
eastern Adriatic coast. In both species the adrenal gland consists of a
cortex and a medulla; the cortex is divided into three zones. Whereas in
the bottlenose dolphin, there is a zona arcuata which contains columnar
cells arranged in the form of arches; in the striped dolphin this zone
is replaced by zona glomerulosa containing rounded clusters of polygonal
cells. In both species, the zona fasciculata consists of radially
oriented cords of polygonal cells, whereas in zona reticularis cells are
arranged in branching and anastomosing cords. The adrenal medulla in
both species contains dark, epinephrine-secreting cells and light
norepinephrine-secreting cells. Epinephrine-secreting cells are
localized in the outer part of the medulla, whereas
norepinephrine-secreting cells are found in the inner part, arranged in
clusters and surrounded by septa of thin connective tissue. The gland is
surrounded by a thick connective-tissue capsule, from where thick
trabeculae extend towards the interior. In the bottlenose dolphin, group
of cells resembling both medullar and cortical cells can be seen within
the capsule; whereas only groups of cells resembling cortical cells are
found within the capsule of the striped dolphin. In the bottlenose
dolphin invagination of the adrenal cortex into the medulla is obvious
as well as medullary protrusions extending through cortex to the
connective tissue capsule.
For reprints please contact:
Prof. dr. Snjezana Vukovic
Department of Anatomy, Histology and Embryology
Faculty of Veterinary Medicine University of Zagreb
Heinzelova 55
10000 Zagreb
Croatia
e-mail: [log in to unmask] <mailto:[log in to unmask]>
Best regards,
Snjezana Vukovic
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