An Intraoral Thermoregulatory Organ in the Bowhead Whale (Balaena mysticetus), the Corpus Cavernosum Maxillaris

@article{Ford2013AnIT,
  title={An Intraoral Thermoregulatory Organ in the Bowhead Whale (Balaena mysticetus), the Corpus Cavernosum Maxillaris},
  author={Thomas James Robert Ford and Alexander Werth and J. Craig George},
  journal={The Anatomical Record},
  year={2013},
  volume={296}
}
The novel observation of a palatal retial organ in the bowhead whale (Balaena mysticetus) is reported, with characterization of its form and function. This bulbous ridge of highly vascularized tissue, here designated the corpus cavernosum maxillaris, runs along the center of the hard palate, expanding cranially to form two large lobes that terminate under the tip of the rostral palate, with another enlarged node at the caudal terminus. Gross anatomical and microscopic observation of tissue… Expand
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References

SHOWING 1-10 OF 57 REFERENCES
Discovery of a sensory organ that coordinates lunge feeding in rorqual whales
Top ocean predators have evolved multiple solutions to the challenges of feeding in the water. At the largest scale, rorqual whales (Balaenopteridae) engulf and filter prey-laden water by lungeExpand
The arterial system of the sperm whale (Physeter macrocephalus)
TLDR
The sperm whale has extraordinarily well‐developed retia mirabilia, distributed in the cranial cavity, vertebral canal, neck and thoracic cavity, around the optic nerve, and in the walls of the uterus. Expand
FUNCTIONAL MORPHOLOGY OF THE MOUTH OF THE BOWHEAD WHALE AND ITS IMPLICATIONS FOR CONSERVATION
TLDR
The shape of the baleen rack in the bowhead appears to be an adaptation to reduce the amplitude of the bow wave projected during feeding, the simultaneous advantage being concentration of prey slurries inside the mouth. Expand
Anatomical evidence for a countercurrent heat exchanger associated with dolphin testes
TLDR
The existence of a countercurrent heat exchanger suggests that cetaceans potentially compensate for detrimental effects of core temperatures on sperm viability and storage by regulating the temperature of blood flow to the testis. Expand
Anatomy of the baculum–corpus cavernosum interface in the Norway rat (Rattus norvegicus), and implications for force transfer during copulation
  • D.A. Kelly
  • Medicine, Biology
  • Journal of morphology
  • 2000
TLDR
It is proposed that the baculum increases the overall flexural stiffness of the penis during copulation by transferring bending and compressive forces from the distal end of the glans to the tensile wall of the corpus cavernosum. Expand
Gray Whales in Cold Water
TLDR
The data presented neither support nor refute the countercurrent heat exchanger hypothesis for the vascular array in the whale tongue, and there appear to be deficiencies in the report's method, results, and interpretations. Expand
Functional morphology of the vascular plexuses associated with the cetacean uterus
The cetacean reproductive system is surrounded by thermogenic locomotory muscle and insulating blubber. This arrangement suggests elevated temperatures at the uterus that could induce detrimentalExpand
Bowhead whale (Balaena mysticetus) growth and feeding as estimated by δ13C techniques
TLDR
Seasonal changes in body δ13C of whales taken in 1986 from Alaskan waters provide a means of estimating energy intake from the different habitats in which the whales feed and provide a measure of age. Expand
The structure of whale blubber, and a discussion of its thermal properties.
  • D. Parry
  • Biology, Medicine
  • The Quarterly journal of microscopical science
  • 1949
TLDR
It is shown that the energy liberated by the reduction in blubber thickness suffered by rorquals in the southern hemisphere during the winter is sufficient to meet at least a significant part of their total needs. Expand
Vasomotor responses of isolated peripheral blood vessels from bowhead whales: Thermoregulatory implications
TLDR
This work tested the vasomotor responses of isolated segments of countercurrent arteries and AVAs from the bowhead tail flukes to norepinephrine (NOR), the sympathetic adrenergic neurotransmitter, and found that isometric tension developed during exposure to a micromolar concentration of NOR was consistently higher in AVAs than in arteries. Expand
...
1
2
3
4
5
...