Document Detail

Histological structure of the adrenal gland of the bottlenose dolphin (Tursiops truncatus) and the striped dolphin (Stenella coeruleoalba) from the Adriatic Sea.
MedLine Citation:
PMID:  19912161     Owner:  NLM     Status:  MEDLINE    
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.
S Vuković; H Lucić; A Zivković; M Duras Gomercić; T Gomercić; A Galov
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-11-12
Journal Detail:
Title:  Anatomia, histologia, embryologia     Volume:  39     ISSN:  1439-0264     ISO Abbreviation:  Anat Histol Embryol     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-18     Completed Date:  2010-09-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7704218     Medline TA:  Anat Histol Embryol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  59-66     Citation Subset:  IM    
Department of Anatomy, Histology and Embryology, University of Zagreb, Croatia.
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MeSH Terms
Adrenal Glands / cytology*,  metabolism
Adrenal Medulla / cytology,  metabolism
Bottle-Nosed Dolphin / anatomy & histology*
Cerebral Cortex / cytology,  metabolism
Epinephrine / secretion
Oceans and Seas
Species Specificity
Stenella / anatomy & histology*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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