What is the primary function of sweat glands?

The primary function of sweat glands is to regulate body temperature. This is achieved through the process of sweating, where sweat is secreted onto the surface of the skin. As sweat evaporates, it cools the skin and helps to lower the body temperature during activities that produce heat, such as exercise or exposure to high temperatures. This thermoregulatory mechanism is crucial for maintaining homeostasis and prevents overheating, which can lead to heat-related illnesses.

The other choices do not reflect the primary function of sweat glands. For example, secreting enzymes is primarily associated with digestive glands and does not pertain to sweat glands. Producing oils is a function of sebaceous glands, which help to keep the skin lubricated but do not play a direct role in temperature regulation. Absorbing nutrients does not relate to the function of sweat glands either, as they are not involved in nutrient uptake but instead focus on the excretion of sweat to facilitate cooling.