VIVO Pathophysiology. Endocrine System > Hypothalamus and Pituitary. Antidiuretic Hormone. Roughly 60% of the mass of the body is water, and despite wide variation in the amount of water taken in each day, body water content remains incredibly stable. Such precise control of body water and solute concentrations is a function of several hormones …
http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/adh.html