What is the main purpose of eccrine sweat glands?

The main purpose of eccrine sweat glands is temperature regulation through evaporative cooling. Eccrine glands are specialized structures found throughout the skin, predominantly on the palms of the hands, soles of the feet, and forehead. When the body temperature rises—due to factors such as exercise, heat, or stress—these glands secrete sweat primarily composed of water and electrolytes onto the surface of the skin. As this sweat evaporates, it helps cool the body down, maintaining a stable internal temperature. This mechanism is vital for thermoregulation, particularly in warm environments or during physical activity.

In addition to their primary function related to temperature control, eccrine sweat glands also contribute to the maintenance of skin hydration and can assist in the excretion of certain waste products in small amounts. However, their primary role is indeed linked to the body's efforts to regulate its temperature efficiently.