Whatever the reason, the emergence of elevated but stable body temperature was a key event that accompanied the proliferation of birds and mammals across the globe, and an understanding of the thermoregulatory system is central to understanding our own physiology.
Over time, this elevated body temperature may have become defended as a means to enable the optimization of cellular processes for a specific temperature range ( Heinrich, 1977). nocturnal foraging and cold climates) ( Bennett and Ruben, 1979 Crompton et al., 1978 Heinrich, 1977). flight) or occupation of new ecological niches (e.g.
One hypothesis is that elevated body temperature evolved as a secondary consequence of the higher metabolic rates needed for sustained activity (e.g. Birds and mammals have the remarkable ability to regulate their internal temperature within a narrow range that is higher than the surroundings.
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