Water is a critical element of the body, and keeping the body adequately hydrated is a must to allow the body to function. Up to 60% of the body's weight is made up of water. Most of the water is found within the cells of the body (intracellular space). The rest is found in the extracellular space, which consists of the blood vessels (intravascular space) and the spaces between cells (interstitial space).
Dehydration occurs when the amount of water leaving the body is greater than the amount being taken in. The body is very dynamic and always changing. This is especially true with water in the body. We lose water routinely when we:
—breathe and humidified air leaves the body (this can be seen on a cold day when you can see your breath in the air, which is just water that has been exhaled);
—sweat to cool the body; and
—eliminate waste by urinating or having a bowel movement.
In a normal day, a person has to drink a significant amount of water to replace this routine loss.
See the chart for amount of hydration needed per body weight for a normal day for healthy people. Our need during treatment may be more and the need for elderly people is important.
medicinenet.com/dehydration...
Edited by Cllady01---take the Hydration quiz!