CAPILLARY DENSITY IN MAMMALS IN RELATION TO BODY SIZE AND OXYGEN CONSUMPTION
CAPILLARY DENSITY IN MAMMALS IN RELATION TO BODY SIZE AND OXYGEN CONSUMPTION
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DOI：
10.1152/ajplegacy.1961.200.4.746
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发表时间：
1961-01-01
影响因子：
--
通讯作者：
PENNYCUIK, P
中科院分区：
文献类型：
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作者：
SCHMI.K;PENNYCUIK, P
小型哺乳动物每克组织的高代谢率要求以比大型动物更高的速率向组织供应氧气。小动物的高氧气输送率可以通过 a) 更高的毛细血管密度和 b) 更高的氧气卸载张力来实现。氧气供应中的这两个因素随着体型的大小而变化，从而促进小动物将氧气输送到组织。本文给出了 10 种不同体型的哺乳动物肌肉毛细血管密度的比较数据。最小的哺乳动物具有明显更高的毛细血管密度，但在所检查的尺寸范围内这种趋势并不明显。因此，可以合理地假设，与毛细血管密度和身体尺寸相关的因素被诸如活动、驯化、冷适应等变量所掩盖，也许主要是肌肉纤维的尺寸，其（尽管取决于身体尺寸）随着肌肉的类型及其用途而有很大变化。
The high metabolic rate per gram of tissue in small mammals requires that oxygen be supplied to the tissues at a higher rate than in larger animals. The high rate of oxygen delivery in the small animal can be accomplished by a) higher capillary density and b) higher unloading tension for oxygen. Both these factors in the oxygen supply vary with body size in such a manner that delivery of oxygen to the tissues is facilitated in the small animal. This paper give comparative data on capillary denisty in muscles from 10 mammals of various size. The smallest mammals have significantly higher capillary densities, but the trend is not evident throughout the size range examined. It is therefore reasonable to assume that the factors that relate caplillary density and body size are overshadowed by variables such as activity, domestication, cold acclimation, etc., and perhaps primarily, the size of the muscle fibers, which (although dependent on body size) varies considerably with the type of muscle and its use.