A small boy remarked that his dog looks larger on cold days than on hot days

      

A small boy remarked that his dog looks larger on cold days than on hot days. Give biological explanation for this.

  

Answers


John
During cold days, there is contraction of erector pilli muscles, hair lies flat hence dog appears larger due to vasoconstriction while, during hot days, there relaxation of erector pilli muscles, hair lies flat hence the dog appears smaller due to vasodilation.
johnmulu answered the question on January 21, 2017 at 12:33


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