Journal
RESPIRATORY PHYSIOLOGY & NEUROBIOLOGY
Volume 234, Issue -, Pages 32-46Publisher
ELSEVIER
DOI: 10.1016/j.resp.2016.09.005
Keywords
Computational fluid dynamics; Nasal passage; Turkey; Conchae; Turbinates; Baffles
Categories
Funding
- National Science Foundation (NSF) Graduate Research Fellowship
- Ohio University
- Ohio University Heritage College of Osteopathic Medicine
- NSF [IOB-0517257, IOS-1050154, IOS-1456503]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1456503, 1050154] Funding Source: National Science Foundation
- Division Of Research On Learning
- Direct For Education and Human Resources [1319293] Funding Source: National Science Foundation
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We tested the aerodynamic function of nasal conchae in birds using CT data from an adult male wild turkey (Meleagris gallopavo) to construct 3D models of its nasal passage. A series of digital turbinectomies were performed on these models and computational fluid dynamic analyses were performed to simulate resting inspiration. Models with turbinates removed were compared to the original, unmodified control airway. Results revealed that the four conchae found in turkeys, along with the crista nasalis, alter the flow of inspired air in ways that can be considered baffle-like. However, these baffle-like functions were remarkably limited in their areal extent, indicating that avian conchae are more functionally independent than originally hypothesized. Our analysis revealed that the conchae of birds are efficient baffles that along with potential heat and moisture transfer serve to efficiently move air to specific regions of the nasal passage. This alternate function of conchae has implications for their evolution in birds and other amniotes. (C) 2016 Elsevier B.V. All rights reserved.
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