Water must be replaced to maintain fluid balance. No minimum daily requirement for water has been established, although a general guideline is set at eight glasses of water per day. People who engage in strenuous exercise or work outside in hot climates, have a fever, vomiting, diarrhea , or excessive urine losses , those on high protein diets or taking diuretics have increased fluid needs. Sweat Glands Sweat glands are simple coiled glands found in the skin in two forms. Most sweat glands are eccrine glands, producing the secretion without destruction of the cells of the glands.
Sweat glands are most numerous on the palms and soles of the feet.
Those glands in the armpit, areola , labia majora and anal region are apocrine glands. Apocrine secretions are those where the apical region of the secreting cells is lost with the secretion. This type of sweat contains protein and carbohydrates that when acted upon by bacteria on the skin take on an odor. Apocrine sweat glands empty into hair follicles while eccrine glands open at the skin surface. All eccrine glands do not function all the time but they respond quickly to heat stress.