Which layer of the integumentary system is responsible for temperature regulation?

The dermis plays a crucial role in temperature regulation due to its vascular nature and the presence of various structures, such as sweat glands and blood vessels. In response to changes in body temperature, blood vessels in the dermis can dilate (vasodilation) or constrict (vasoconstriction). When the body overheats, the dermis allows for increased blood flow to the surface of the skin, facilitating heat loss through radiation, conduction, and convection. Additionally, sweat glands, also located in the dermis, produce sweat that evaporates from the skin's surface, further helping to cool the body. Conversely, when body temperature drops, the dermis restricts blood flow to conserve heat. This dynamic response to temperature fluctuations is essential for maintaining homeostasis in the body.