70% of the human body is comprised of water, 82% of blood is water; 70% of the brain and 90% of the lungs are nothing but water. Water is a part of all the body tissues and body fluids including blood, urine, saliva, sweat, cerebrospinal fluid, gastric juices, pancreatic juices, etc. Water is necessary for almost all the body functions and activities like:

Deficiency of water is also termed as dehydration and this deficiency can lead to digestive disorders, constipation, formation of kidney stones, low blood pressure, dry skin, headache and nausea, fainting, etc.

Therefore, one should know the adequate amounts of water your body needs daily in a particular environment to save you from several health hazards.