The brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even our bones are 31% water.
Each day humans must consume a certain amount of water to survive. Of course, this varies according to age and gender, and also by where someone lives. Generally, adults need at least two litres of water per day to stay properly hydrated. All of the water a person needs does not have to come from drinking liquids, as some of this water is contained in the food we eat.
Water serves a number of essential functions to keep us all going. Water is a vital nutrient to the life of every cell, acting first as its building material. Water regulates our internal body temperature through sweating and respiration. The carbohydrates and proteins that our bodies use as food are metabolised and transported by water in the bloodstream.
Water also plays an important part in flushing waste, mainly through urination, and the kidneys require adequate water intake to function properly. Water also acts as a shock absorber for the brain, as well as the spinal cord and foetus when a woman is pregnant. Water helps us to form saliva, which is crucial when eating, and water also helps to lubricate our joints and prevents inflamation.
The unique qualities and properties of water are what make it so important and basic to life. The cells in our bodies are full of water and use it as their main building blocks for generation and regeneration. The excellent ability of water to dissolve so many substances allows our cells to use valuable nutrients, minerals, and chemicals in biological processes. No less important is the ability of water to transport waste material out of our bodies.
It’s impossible to overstate the importance of water to every form of life. We’re made of it and we need to regularly consume it to keep our bodies operating well. Just by regularly drinking water, and aiming to consume at least two litres a day, we can help our bodies function at their best.
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