Daily Requirements Of...

WATER
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:

* Regulation of body temperature
* Moistening of the body tissues (e.g. mouth, eyes, nose etc.)
* Detoxification of waste products by flushing them out through the kidneys and liver
* Important source of transport in the form of blood for various nutrients and oxygen
* Dissolves various soluble nutrients and minerals to aid their absorption and digestion

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.

BMR

BSA(BODY SURFACE AREA)
The Basal Metabolic Rate (BMR) of the body is the rate at which the body uses up energy at rest. This is the minimum amount of calories that a body requires to stay alive. This value varies from person to person, and even in the same individual, the BMR can differ at different periods of time, depending upon his or her age, health status, and external environment. Thus, while the BMR is known to reduce in hypothyroidism, the opposite occurs in hyperthyroidism. The BMR also increases at colder temperatures as the body burns more calories to stay warm.

Males have a greater muscle mass as compared to females, who have more body fat. Since muscles burn more calories in comparison to fat, a male usually has a BMR value that is higher than that of a female of the same age, with a similar build, and in the same environment.
As the name indicates, the body surface area (BSA) is the total area that covers the entire surface of the human body. This value if of great importance in medicine because the dose and dosage of drugs and the amount of fluids to be administered intravenously are usually calculated taking the BSA into consideration. Certain indices such as the glomerular filtration rate (GFR) and cardiac index are calculated in relation to the BSA.

Although there are many formulas to calculate the BSA, the ones based on the height and weight are commonly used as these are less complex and the results are more or less consistent.
CALORIES
Recommended daily calorie intake varies from person to person, but there are guidelines for calorie requirements you can use as a starting point.