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Title: Morphological Structure of the Aortic Wall in Deep Diving Cetacean Species: Evidence for Diving Adaptation
Authors: Mompeó Corredera, Blanca Rosa 
Sacchini, Simona 
Quintana Montesdeoca, María Del Pino 
Rivero Santana, Miguel Antonio 
Consoli ,Francesco Mª Achille 
Fernández Rodríguez, Antonio Jesús 
Bernaldo De Quirós Miranda, Yara 
UNESCO Clasification: 3109 Ciencias veterinarias
Keywords: Aortic Artery Diving Habit
Lamellar Unit
Marine Mammal
Odontoceti Cardiovascular System
Issue Date: 2022
Journal: Veterinary Sciences 
Abstract: This study analyses the aortic wall structure in nine cetacean species with deep diving habits belonging to four Odontoceti families: Ziphiidae, Kogiidae, Physteridae, and Delphinidae. Samples of ascending, thoracic and abdominal aorta were processed for histological and morphometric studies. The elastic component was higher in the proximal aortic segments, and the muscular elements increased distally in all cases. Morphometric analyses showed that all families presented a decrease in the thickness of the arterial wall and the tunica media along the aorta. The reduction was dramatic between ascending and thoracic aorta in the Physeteridae specimens; meanwhile, the other three families showed a more uniform decrease between the ascending, thoracic and abdominal aorta. The decline was not correlated with a reduced elastic or lamellar unit thickness but with a loss of lamellar units. The organization of the elements in the aortic wall did not show essential modifications between the four families, resembling the structure described previously in the shallow and intermediate diving dolphins. Our findings support that the difference in the morphometric characteristics of the different segments in the aortic wall is likely related to the diving habit more than the absolutes values of any other parameter.
ISSN: 2306-7381
DOI: 10.3390/vetsci9080424
Source: Veterinary Sciences [EISSN 2306-7381], v. 9 (8), 424, (Agosto 2022)
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