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Water has a very important role in the lives of all living organisms. Our bodies are nearly 60% water. All life evolved in water, and therefore all chemical reactions and the structure of all molecules that make up the body require water. Water is the single most essential molecule for life. Water also is a convenient transport system, explaining why fluids (for example, blood) transport nutrients and many other things throughout our bodies. As I have mentioned before, the human body consists mostly of water: 60% of the body, 75% of the blood, 78% of the muscles and 92% of the brain. The body therefore relies very heavily on water to function properly. Water regulates body temperature, is responsible for the transport of nutrients and wastes around the body and is very important in maintaining a healthy and balanced homeostasis (control & regulation of the body's functions). Without food the average human can survive up to 40...

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