Eccrine sweat glands are small, coiled structures located in the skin that produce sweat. They are found all over the body, with the highest concentration on the palms, soles, and forehead. These glands play a crucial role in regulating body temperature through the process of evaporation, helping to cool the skin when it gets hot. The sweat produced by eccrine glands is mostly composed of water, with small amounts of salts and other substances. Unlike apocrine sweat glands, which are found mainly in the armpits and groin, eccrine glands are active throughout life and are not associated with body odor.