Thirst is the sensation of needing and/or wanting to drink. It has
been variously described as “the perception of one's need for drink”
, as “the consequence of the need to moisten the mouth” and as
“a physiological state linked to fluid deficit”.Physiologically,thirst is part of the mechanism that controls osmolality or volume of the
extracellular liquid, and is mainly regulated by the brain in the
hypothalamus [13], however other associated and peripheral organs
also play a role (reviewed by Sewards and Sewards [14]).