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The cardiac ventricles of a baleen whale (Balaenoptera acutorostrata: minke whale) and a toothed whale (Hyperoodon ampullatus: bottlenose whale)



The cardiac ventricles of a baleen whale (Balaenoptera acutorostrata: minke whale) and a toothed whale (Hyperoodon ampullatus: bottlenose whale)



Journal of Morphology 1681: 85-96



Fifteen minke whale (B. acutorostrata: Mysticeti) and 3 bottlenose whale (H. ampullatus: Odontoceti) hearts were obtained. Only the ventricular mass and the base of the great arteries were available. The shape of the heart, the double apex, the narrowness of the interventricular septum in the dorsiventral plane, the side-to-side position of the ventricles, the relative thickness of the wall of the right ventricle and the heavy trabeculation agree with other, brief reports of whale heart morphology. Coronary artery tortuosity, which was described in sperm whales Physeter catodon by others, was found in the bottlenose but not in the minke whales. The shape of the heart may be associated with depth and duration of dives and that the pattern of trabeculation may be related to the size of the animal.

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Accession: 021897189

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DOI: 10.1002/jmor.1051680109


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