Which gland produces perspiration that helps regulate body temperature?

The eccrine gland is responsible for producing perspiration, which plays a crucial role in regulating body temperature. These glands are distributed throughout the skin, particularly on the palms, soles, and forehead. They secrete a watery sweat directly onto the surface of the skin, which evaporates and cools the body down. This evaporation process is key to thermoregulation, especially in response to heat or physical activity.

In contrast, the other glands listed serve different functions. The apocrine gland primarily produces a thicker sweat in areas like the underarms and groin, often associated with body odor, and does not play a significant role in thermoregulation. The sebaceous gland is responsible for producing sebum, an oily substance that lubricates and protects the skin and hair, but does not contribute to perspiration. The thyroid gland, while important for regulating metabolism and overall body functions, is not involved in the production of sweat or temperature regulation.