Nasal heat exchange in a northern ungulate, the reindeer ( Rangifer tarandus)
When reindeer were exposed to low ambient temperatures, heat and water were recovered from the exhaled air by a nasal counter-current heat exchanger. Measurements of respiratory frequency, minute volume, exhaled air temperature and metabolic rate were made over a range of ambient air temperatures ex...
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| Veröffentlicht in: | Respiration physiology 1985-03, Vol.59 (3), p.279-287 |
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| container_title | Respiration physiology |
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| creator | Langman, V.A. |
| description | When reindeer were exposed to low ambient temperatures, heat and water were recovered from the exhaled air by a nasal counter-current heat exchanger. Measurements of respiratory frequency, minute volume, exhaled air temperature and metabolic rate were made over a range of ambient air temperatures extending from −5.5 ° C to 27.2 ° C. At ambient air temperatures less than 10 ° C the exhaled air temperatures were an average of 21 ° C less than body temperature. The reduction of the exhaled air temperature at the lowest ambient air temperatures used in this study resulted in the recovery of 75% of the heat added and 80% of the water added to the inspired air on its way to the lungs. The heat and water recovered by the nasal temporal counter-current heat exchange in reindeer significantly reduced the metabolic cost of survival during cold exposure. |
| doi_str_mv | 10.1016/0034-5687(85)90133-1 |
| format | Article |
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Measurements of respiratory frequency, minute volume, exhaled air temperature and metabolic rate were made over a range of ambient air temperatures extending from −5.5 ° C to 27.2 ° C. At ambient air temperatures less than 10 ° C the exhaled air temperatures were an average of 21 ° C less than body temperature. The reduction of the exhaled air temperature at the lowest ambient air temperatures used in this study resulted in the recovery of 75% of the heat added and 80% of the water added to the inspired air on its way to the lungs. The heat and water recovered by the nasal temporal counter-current heat exchange in reindeer significantly reduced the metabolic cost of survival during cold exposure.</description><identifier>ISSN: 0034-5687</identifier><identifier>DOI: 10.1016/0034-5687(85)90133-1</identifier><identifier>PMID: 3992062</identifier><identifier>CODEN: RSPYAK</identifier><language>eng</language><publisher>Shannon: Elsevier B.V</publisher><subject>Animals ; Biological and medical sciences ; Body Temperature ; Body Temperature Regulation ; Body Water - metabolism ; Counter-current heat exchange ; Expired air temperature ; Fundamental and applied biological sciences. Psychology ; Humidity ; Male ; Nose - physiology ; Reindeer - physiology ; Respiration ; Thermoregulation. Hibernation. Estivation. 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The heat and water recovered by the nasal temporal counter-current heat exchange in reindeer significantly reduced the metabolic cost of survival during cold exposure.</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Body Temperature</subject><subject>Body Temperature Regulation</subject><subject>Body Water - metabolism</subject><subject>Counter-current heat exchange</subject><subject>Expired air temperature</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humidity</subject><subject>Male</subject><subject>Nose - physiology</subject><subject>Reindeer - physiology</subject><subject>Respiration</subject><subject>Thermoregulation. Hibernation. Estivation. 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| ispartof | Respiration physiology, 1985-03, Vol.59 (3), p.279-287 |
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| subjects | Animals Biological and medical sciences Body Temperature Body Temperature Regulation Body Water - metabolism Counter-current heat exchange Expired air temperature Fundamental and applied biological sciences. Psychology Humidity Male Nose - physiology Reindeer - physiology Respiration Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects Vertebrates: anatomy and physiology, studies on body, several organs or systems Water conservation |
| title | Nasal heat exchange in a northern ungulate, the reindeer ( Rangifer tarandus) |
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