warm-bloodedness

Mammalian temperature regulation

Warm-bloodedness is the ability to maintain a constant internal body temperature regardless of the environment—a trait of mammals and birds.

The term extends figuratively to passionate or ardent temperament: Her warm-bloodedness made her quick to anger and quick to forgive.

endothermy

thermoregulation

Maintaining stable internal heat

shivering · brown adipose tissue · thermal insulation · hypothalamus · vasodilation · vasoconstriction · piloerection · panting · sweating · torpor

mammals

fur

Animal body hair

livebirth · marsupials · monotremes · cetaceans · primates · rodents · bats · ungulates · insulation · blubber

birds

feathers

Bird's lightweight covering

nesting · eggs · preening · down · contour feathers · ornithology · songbirds · raptors · waterfowl · roosting

metabolism

cellular respiration

Cell-level fuel burning

oxygen consumption · mitochondria · thyroid · hormones · catabolism · anabolism · glucose · fatty acids · energy expenditure

vitality

energy

Power to do work

spiritedness · passion · ardor · fervor · intensity · enthusiasm · vivacity · exuberance · dynamism · heartiness

Categories
Opposites
thermoregulation biology

warm-bloodednesscold-bloodedness

Unfeeling, merciless nature

ectothermy · coldness · cold-heartedness · heartlessness · callousness

Family

warm, blood, blooded, warm-blooded, warmer, warmest, warmly, warmth, warmness

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Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G