What is water:
According to merriam-webster
the liquid that descends from the clouds as rain, forms streams, lakes, and seas, and is a major constituent of all living matter and that when pure is an odorless, tasteless, very slightly compressible liquid oxide of hydrogen H2O which appears bluish in thick layers, freezes at 0° C and boils at 100° C, has a maximum density at 4° C and a high specific heat, is feebly ionized to hydrogen and hydroxyl ions, and is a poor conductor of electricity and a good solvent.
Chemical composition of water:
The water molecule is composed of two hydrogen atoms, each linked by a single covalent bond to an oxygen atom.
Water on earth :
Water covers 71% of the Earth’s surface, mostly in seas and oceans. Small portions of water occur as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in the air as vapor, clouds (formed of ice and liquid water suspended in air), and precipitation (0.001%).
Water in human body:
Water is major component of human body comprising about 45-75% of body weight this percentage may vary according to your age and gender. The highest content of water is in infants comprising about 75-78% of body weight this percentage then decrease to 65% when child is grown to 1 year of age. A healthy adult male has high content of water as compare to a healthy adult female reason is more fatty tissues ratio as compare to lean tissues in females. An average adult male has 60% of water while in females this percentage decreases to 55%. This percentage further decreases in elderly people to only 45%.
What Is the Function of Water in the Body?
- Water is the main component of every cell and give life to every cell
- It helps in regulating body temperature through sweating and respiration
- Serves as a lubricant to bones joint
- Required to metabolize protein and carbohydrates used as food and helps in transportation of nutrients through blood stream
- Water carries oxygen and nutrients to cells
- Saliva is primarily composed of water
- Helps in excretion of body waste and toxins through urine
- Water acts as a shock absorber and insulates the brain, spinal cord, organs and foetus
- Water is the principle solvent in the body and dissolves minerals, soluble vitamins and certain nutrients
From this you can understand how important water is for your life but have you ever thought its excessive intake can cause harm to your body.
OVER-HYDRATION and its effect:
Over hydration is excessive intake of water and this does not happen accidentally usually this happens intentionally for example athletes drink too much water to keep themselves hydrated and avoid dehydration but this well hydration sometimes become too much and cause dilution of minerals like sodium and potassium which may result in headache followed by confusion , seizures, coma and sometimes it may cause death due to accumulation of water in brain and other organs which result in edema or swelling of organs.
Another example of over hydration is water diet. What happens in this type of diet is people taking this type of diet fast most of time and drinks plenty of water to fill their stomach this excessive intake of water makes extra pressure on kidney and results in kidney damage slowly and gradually.
So what we conclude is excessive of everything is bad whether it is water. An average daily requirement is 8 glass of water this may vary according to weather and your health condition or your present circumstances.
So stay hydrated but don’t overdo this!