While a person can live for a few weeks without eating any food, that same person can only live a few days without water.
Water is used as temperature control both for our bodies as well as our planet.
Water gets rid of body waste and can help with a number of health concerns: constipation, functioning of the endocrine glands, muscle tone, kidney function, metabolization of fat and, obviously, dehydration.
Water carries oxygen and other nutrients to the body's cells
Ninety percent of a person's blood and ninety percent of a tree's sap is made of water.
Water can absorb energy vibrations. Earthquakes that happen under the ocean are rarely felt on land. Getting healthy and fit.
Water is what tells a seed to grow. You can plant a seed in soil, but if you do not give it water, it will never grow into a plant. The water is what splits the outer coat of a seed exposing the "embryo" to the oxygen in the soil that helps it to start growing. Water is also how the seed gets the nutrients it needs from the soil.
Without water, living things would be mired in their own waste. Water moves the waste away and cleanses the earth to keep it clean. If something doesn't stay clean, it can't stay healthy.
Water, when boiled, can kill the bacteria and other harmful agents found on food or plates. This is the only way to make sure that something is completely clean and safe for use.
Water is also the only substance that can get the dirt and bacteria off of our bodies.
Without water, there would not be life. Even the single celled organisms need water in which to live. It was from the water that life began. Water is also the only element that can exist in all three states: gas, solid and liquid and all three states are beneficial to humans. It is very easy to take our water for granted. It has always been here-in fact, the water on the planet today is likely the same water on that was on the planet even before the dinosaurs roamed it. Why is water important? Because without it, we would not exist.