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Discuss the uses of water in the body.

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Introduction

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 days; without water you cannot survive for more than 3 days. When the body loses water this is known as dehydration. ...read more.

Middle

This intake should be greater depending on weight and the activity level of the individual. Most importantly in very hot condition dehydration increases enormously, both in the sun and also in air-conditioned environments. However, most people only drink when they are thirsty: this is a mistake as thirst is the sign of the body being very short of water and it should be consumed long before the pangs of thirst arrive. Soft drinks are not appropriate for this replenishment of the body's water supply as they often contain sugar and caffeine both of which increase the level of metabolism and lead to further dehydration. Thinking of water as the oil for the engine and considering the value of one's health and well being, you should give your body the very best water that you can. As important as water is to the human body and essential for our survival, good quality, pure, natural drinking water is very rare on this planet. Although 70% of the planet is covered with water, only approximately 2% is freshwater suitable for drinking, the rest being predominantly salt or seawater. ...read more.

Conclusion

This process is known as hydrolysis. During it parts of a water molecule are added to the two separated parts. Carbohydrates, fats and proteins can be split in this way. *Large carbohydrates such as starch can be split to form smaller carbohydrates such as glucose. *Fats or lipids can be split into glycerol and other molecules including chemicals called fatty acids. *Proteins can be split into the buildings blocks from which they were constructed, namely amino acids. In a reverse way, enzymes can assist with the removal of water molecules enabling some small molecules to join together to form large ones. This process is called condensation and can be looked upon as condensing two or more molecules together to make one molecule. By removing water at a molecular level: *simple sugars like glucose can be joined together to form complex carbohydrates such as starch, *glycerol and certain other molecules can form fats or lipids and *amino acids can be joined together to make protein. So concluding this essay- it is pretty obvious and clear to see that the importance of water within the human body is extremely essential and without water in our lives we simply would not be alive. ...read more.

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