Water is a chemical substance with the chemical formula H2O single molecule of water contains 2 atoms of Hydrogen and 1 atom of Oxygen joined together with a bond called covalent bond. Water has three states of matter, namely solid, liquid and gas. At normal temperature and pressure water is in liquid state, at a temperature above 100o C, it starts converting in vapor and below 0o C it starts solidifying and is called ice. Water covers 70.9% of earth’s surface and is vital for all known forms of life. In fact the human body is also mostly water; two third of our body weight comes from water.
Chemical properties of water:
i. Water is a liquid at room temperature and pressure or rather at normal temperature and pressure. It is tasteless and odorless. In fact, all living beings have a very sound understanding of its taste and odor; even animals do not drink dirty, chemically treated or harmful water. The intrinsic color of water and ice is slightly blue, although both appear colorless in small quantities.
ii. Most of the things get very easily dissolved in water, that is why they are called ‘universal solvent’
iii. Water makes up for more than two-thirds of human body weight, living beings might live for days without food but it is very difficult rather impossible to survive without water even for two days. Dehydration (prolong) leads to the thickening of blood, which is very harmful for the whole body and major damage could happen to our heart, kidneys and brain in this case.
iv. The human brain is made up of 95% water, blood is 82% and lungs are 90% water.
v. A mere 2% drop in our body’s water supply can trigger signs of dehydration, like shivering of skin, parched lips, lightheadedness, dizziness and sometimes a person may faint even.
Function of water in the body:
i. Water keeps the body hydrated.
ii. Water serves as lubricant
iii. Maintains the Sodium and Potassium balance generally called the electrolyte balance of the body.
iv. It removes the toxins from the body through urine and sweat that is through kidney and skin respectively.
v. Maintains a proper body temperature, mostly reduces the temperature in summers by sweat.
vi. Provides luster to skin and hair.
vii. In case of blood thickening water is advisable as it works as blood thinner.
viii. It regulates bowel movements; in fact those people who do not have sufficient water can develop constipation.
ix. Water can help in weight reduction.
x. Water has been found to be associated with reducing anxiety, people who complain of such problems are advised to take water first perhaps water immediately maintains the electrolyte balance in the body.
Thus, we see how important the water is for life and health, we can do without food for a day or two but life is very difficult without water. One must drink at least 2 to 3 liters of water every day for good health, and for those suffering from obesity, hypercholesterolemia, constipation or diabetes, the water intake should not be less than 3 liters.
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