Biology, 17.07.2019 04:30 itsstaytay200

In order to retain heat, what occurs in the skin on a cold day? a. blood vessels of the dermis constrict. b. blood vessels of the dermis dilate. c. blood vessels of the epidermis constrict. d. blood vessels of the epidermis dilate.

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In order to retain heat, what occurs in the skin on a cold day? a. blood vessels of the dermis cons...

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