Initially, the body cycles through periods of blood vessel dilation and constriction. However, as the temperature drops, blood vessels cease dilation and remain constricted as the body conserves nearly all of its warm blood to protect the heart, lungs, and brain.
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Initially, the body cycles through periods of blood vessel dilation and constriction. However, as the temperature drops, blood vessels cease dilation and remain constricted as the body conserves nearly all of its warm blood to protect the heart, lungs, and brain.