Biology / Bio 2729 · Atom · ~20 seconds
Endotherms and Ectotherms
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State
An endotherm generates and conserves its own body heat to stay relatively constant regardless of environment; an ectotherm's temperature instead tracks the environment.
Show
A polar bear's fur and fat maintain a warm core in freezing water; a lizard's temperature rises and falls with the sun.
Watch for
"Cold-blooded" is loose shorthand — a desert ectotherm can run warm despite tracking its environment.