Langille B L, Crisp B
Am J Physiol. 1980 Sep;239(3):R248-53. doi: 10.1152/ajpregu.1980.239.3.R248.
The temperature dependence of the viscosity of blood from frogs and turtles has been assessed for temperatures between 5 and 40 degrees C. Viscosity of turtles' blood was, on average, reduced from 3.50 +/- 0.16 to 2.13 +/- 0.10 cP between 10 and 30 degrees C, a decline of 39%. Even larger changes in viscosity were observed for frogs' blood with viscosity falling from 4.55 +/- 0.32 to 2.55 +/- 0.25 cP over the same temperature range, a change of 44%. Blood viscosity was highly correlated with hematocrit in both species at all temperatures. Viscosity of blood from both frogs and turtles showed a large standard deviation at all temperatures and this was attributed to large individual-to-individual variations in hematocrit. Turtles heat faster than they cool, regardless of whether tests are performed at temperatures above or below the range of thermal preference. The effect of temperature dependence of blood viscosity on heating and cooling rates is demonstrated.
已评估了青蛙和乌龟血液粘度在5至40摄氏度之间的温度依赖性。在10至30摄氏度之间，乌龟血液的粘度平均从3.50±0.16厘泊降至2.13±0.10厘泊，下降了39%。在相同温度范围内，青蛙血液的粘度变化更大，从4.55±0.32厘泊降至2.55±0.25厘泊，变化了44%。在所有温度下，两种动物的血液粘度与血细胞比容都高度相关。青蛙和乌龟的血液粘度在所有温度下都显示出较大的标准差，这归因于血细胞比容在个体之间的巨大差异。无论测试是在高于还是低于热偏好范围的温度下进行，乌龟升温都比降温快。文中展示了血液粘度的温度依赖性对升温和降温速率的影响。
