What structures located in the dermis and emptying on to the surface of the skin help to regulate temperatures?

The structures located in the dermis that help regulate temperature are sweat glands and blood vessels. Sweat glands, when activated, produce sweat that evaporates on the skin's surface, cooling the body. Additionally, blood vessels in the dermis can dilate to increase blood flow to the skin, promoting heat loss, or constrict to retain heat when needed. Together, these mechanisms play a crucial role in thermoregulation.