Eccrine glands are a type of sweat gland found throughout the human body, primarily in areas like the palms, soles, and forehead. They play a crucial role in regulating body temperature by producing a watery sweat that evaporates from the skin's surface, helping to cool the body down. Unlike apocrine glands, which are concentrated in specific areas and produce a thicker, odoriferous sweat, eccrine glands are not associated with hair follicles. Their secretion is mostly composed of water, salt, and small amounts of waste products, making them essential for thermoregulation and maintaining skin hydration.