Sisters of the sinuses: cetacean air sacs.

  title={Sisters of the sinuses: cetacean air sacs.},
  author={Joy S Reidenberg and Jeffrey T. Laitman},
  journal={Anatomical record},
  volume={291 11},
This overview assesses some distinguishing features of the cetacean (whale, dolphin, porpoise) air sac system that may relate to the anatomy and function of the paranasal sinuses in terrestrial mammals. The cetacean respiratory tract has been modified through evolution to accommodate living in water. Lack of paranasal sinuses in modern cetaceans may be a diving adaptation. Bone-enclosed air chambers are detrimental, as their rigid walls may fracture during descent/ascent due to contracting/re… CONTINUE READING
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