When you are hot, blood vessels in the dermis to maintain homeostasis. When you are cold, blood vessels in the dermis to maintain homeostasis. Heat loss from the body will , when blood vessels in the dermis dilate. Heat loss from the body will when blood vessels in the dermis constrict.
Blood vessels in the dermis dilate in the hot days or during exercise to cool off the body by sweating. During cold, the same blood vessels will constrict to keep the body warm and reduce the heat loss.
