Structure-function relationships in the nasal cavity of Arctic and subtropical seals
The heating and moistening of inhaled air, and the cooling and moisture removal from exhaled air, are crucial for the survival of animals under severe environmental conditions. Arctic mammals have evolved specific adaptive mechanisms to retain warmth and water and restrict heat loss during breathing...
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ftoslouniv:oai:www.duo.uio.no:10852/107085 2024-02-11T09:59:37+01:00 Structure-function relationships in the nasal cavity of Arctic and subtropical seals ENEngelskEnglishStructure-function relationships in the nasal cavity of Arctic and subtropical seals Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars 2024-01-05T11:03:52Z http://hdl.handle.net/10852/107085 https://doi.org/10.1016/j.bpj.2023.11.012 EN eng Biophysical Society Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars . Structure-function relationships in the nasal cavity of Arctic and subtropical seals. Biophysical Journal. 2023, 122(24), 4686-4698 http://hdl.handle.net/10852/107085 2221243 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Biophysical Journal&rft.volume=122&rft.spage=4686&rft.date=2023 Biophysical Journal 122 24 4686 4698 https://doi.org/10.1016/j.bpj.2023.11.012 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ 0006-3495 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2024 ftoslouniv https://doi.org/10.1016/j.bpj.2023.11.012 2024-01-24T23:39:44Z The heating and moistening of inhaled air, and the cooling and moisture removal from exhaled air, are crucial for the survival of animals under severe environmental conditions. Arctic mammals have evolved specific adaptive mechanisms to retain warmth and water and restrict heat loss during breathing. Here, the role of the porous turbinates of the nasal cavities of Arctic and subtropical seals is studied with this in mind. Mass and energy balance equations are used to compute the time-dependent temperature and water vapor profiles along the nasal passage. A quasi-1D model based on computed tomography images of seal nasal cavities is used in numerical simulations. Measured cross-sectional areas of the air channel and the perimeters of the computed tomography slices along the nasal cavities of the two seal species are used. The model includes coupled heat and vapor transfer at the air-mucus interface and heat transfer at the interfaces between the tissues and blood vessels. The model, which assumes constant blood flow to the nose, can be used to predict the temperature of the exhaled air as a function of ambient temperature. The energy dissipation (entropy production) in the nasal passages was used to measure the relative importance of structural parameters for heat and water recovery. We found that an increase in perimeter led to significant decreases in the total energy dissipation. This is explained by improved conditions for heat and water transfer with a larger complexity of turbinates. Owing to differences in their nasal cavity morphology, the Arctic seal is expected to be advantaged in these respects relative to the subtropical seal. Article in Journal/Newspaper Arctic Arctic Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Biophysical Journal 122 24 4686 4698 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
The heating and moistening of inhaled air, and the cooling and moisture removal from exhaled air, are crucial for the survival of animals under severe environmental conditions. Arctic mammals have evolved specific adaptive mechanisms to retain warmth and water and restrict heat loss during breathing. Here, the role of the porous turbinates of the nasal cavities of Arctic and subtropical seals is studied with this in mind. Mass and energy balance equations are used to compute the time-dependent temperature and water vapor profiles along the nasal passage. A quasi-1D model based on computed tomography images of seal nasal cavities is used in numerical simulations. Measured cross-sectional areas of the air channel and the perimeters of the computed tomography slices along the nasal cavities of the two seal species are used. The model includes coupled heat and vapor transfer at the air-mucus interface and heat transfer at the interfaces between the tissues and blood vessels. The model, which assumes constant blood flow to the nose, can be used to predict the temperature of the exhaled air as a function of ambient temperature. The energy dissipation (entropy production) in the nasal passages was used to measure the relative importance of structural parameters for heat and water recovery. We found that an increase in perimeter led to significant decreases in the total energy dissipation. This is explained by improved conditions for heat and water transfer with a larger complexity of turbinates. Owing to differences in their nasal cavity morphology, the Arctic seal is expected to be advantaged in these respects relative to the subtropical seal. |
format |
Article in Journal/Newspaper |
author |
Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars |
spellingShingle |
Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
author_facet |
Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars |
author_sort |
Cheon, Hyejeong |
title |
Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
title_short |
Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
title_full |
Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
title_fullStr |
Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
title_full_unstemmed |
Structure-function relationships in the nasal cavity of Arctic and subtropical seals |
title_sort |
structure-function relationships in the nasal cavity of arctic and subtropical seals |
publisher |
Biophysical Society |
publishDate |
2024 |
url |
http://hdl.handle.net/10852/107085 https://doi.org/10.1016/j.bpj.2023.11.012 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
0006-3495 |
op_relation |
Cheon, Hyejeong Kjelstrup, Signe Kizilova, Nataliya Flekkøy, Eirik Grude Mason, Matthew J. Folkow, Lars . Structure-function relationships in the nasal cavity of Arctic and subtropical seals. Biophysical Journal. 2023, 122(24), 4686-4698 http://hdl.handle.net/10852/107085 2221243 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Biophysical Journal&rft.volume=122&rft.spage=4686&rft.date=2023 Biophysical Journal 122 24 4686 4698 https://doi.org/10.1016/j.bpj.2023.11.012 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1016/j.bpj.2023.11.012 |
container_title |
Biophysical Journal |
container_volume |
122 |
container_issue |
24 |
container_start_page |
4686 |
op_container_end_page |
4698 |
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1790595434318659584 |