Water is the most important component of our body. On the behalf of importance, water has the second position for the body need after oxygen. Water is present in 60-70% in an adult's body. Evidence has shown that a man can survive without food about 21 days but in critical conditions it is going to be hard to survive more than 2 days without water, if the weather is in moderate condition then it can be done to 2-5 days. Although some reports told that a man can survive without water about 8 days but it may be dangerous without living water. Our body gets the ill effect to loose 10% of water and more than 10% there are severe results are shown in the body that can be caused of death.


We all are known the importance of water for living being but despite all these facts water is always been ignored by the people but they have to know that water is as important as any other of nutrients.

Water plays a vital role for all living cells. They all have water and it can be differ (water amount) in different cells according to their origin and presence such as teeth have about 10 percent of water, bones have (25 percent) and striated muscles have about 80 percent of water. Water which is present in us is basically classified into 2 types.

 1) Intracellular water
 2) Extracellular water.

Intracellular water is present about 50 percent and extracellular water is about 20 percent.

Extracellular water is present in many forms such as plasma has about 41 percent of water, tissue fluid has about 6 percent and lymph is about 7 percent. Cerebrospinal fluid in the brain and aqueous humor of eyes are the example of body water or fluid.

Infants and children have more water in their body than adults and in adults, it gets vary according to their body weight, that means an obese person has more fatty tissues in the comparison of water and a lean person has less fatty tissues and more water present in the body.

We can get this from below sources

From food
We can get about 1 liter of water from our daily diet because our food contains water, some have less and some have more, water is available in adequate amount in green veggies and fruits.

From beverages
This is the most effective or direct to take water such as drinking water, milk, soup, coffee, and tea.

From oxidation
 After the metabolism of protein, and carbs there is also produced water and this is called metabolic water. After oxidation of nutrients in tissues water is also produced with energy and this differs in different nutrients for example 1 gm carb is given 0.6 gm water and 1 gm fat gives about 1.07 gm and from this process our body gets about 300 ml of water in whole day long.

Rainwater is the purest form of water but when it entered into the environment it gets contaminated by mixing with many impurities of the environment. Water is a great solvent of nature, so gets impure very quickly.

Naturally, water is classified according to the presence of minerals into this. 

1) soft water 
    It is less in minerals and almost get used for cooking y drinking.

2 ) Hard water
In the comparison of soft water, it has more minerals and feels salty in taste. Presence of minerals has increased the boiling temperature of hard water. Generally, this water is not good for bathing and washing clothes because it doesn't make foam as easy as soft water so, we have to purify it before using it.

If hard water has calcium and magnesium bicarbonates, it can be converted into co2 and carbonates by boiling but when it has chloride and sulfate then it can't get purified by boiling. Chemicals such as soda, calcium carbonate, sodium carbonate are used to purify this.

Functions of water
 Water is a good temperature regulator. It regulates our body temperature through sweating. When our body gets heat it starts sweating to balance the  temperature.

Water works as a protector for soft organs. Water is found surrounding the lungs, heart, and brain. These organs are situated in a sac-like structure filled with fluid and this fluid saves internal organs from an outer stroke.

Water used as a body building material because this is present in each and every living cells. Amount of water in cells is depending on their activities, more active has more water and less active has less amount of water present in cells. Blood cells have about 90 percent and muscles have about 80 percent of water. 

Water is also known as a lubricant. A sac-like structure filled with synovial fluid present around the internal organs and joints, this makes them safe from friction during movement and make transportation easy between cells and capillaries.

Water is a great solvent so, it has an important role in chemical activities because the chemical changes in cells are depending on this quality. metabolism, absorption is dependent on blood and lymph cells because they make a solution with nutrients to transport them in different body parts. Waste materials are also mixed with water and excreted by lungs and kidney. Stool and urine have also water to create them from the body.

Daily requirements of water

 The NAM suggests water consumption habits of daily water intake for an average adult female is 2.7 liters (11 cups) and 3.7 liters (15 cups) for an average adult male. This is a standard volume and we all have to alert about adequate water In 

Our body and we can use not only water but all beverages such as fruit juices, soups, milk are taken also to complete the water volume.