Everyone Needs Water

Topics: Water, Life, Metabolism Pages: 2 (626 words) Published: May 26, 2013
It is colourless and tastless, but we see it and we need it every day. We use so much of it, yet there’s so little of it. Can anybody guess what it is? Its “water .

70% of the Earth’s surface is covered with water is and without a doubt it is the most precious natural resource that exists on our planet. The human body is made up of nearly 70% water. It is said that All life on earth started in water, and chances are that it will also end there. Which simply means: No water equals no life. Water is also involved in many chemical reactions in our body, without it our body cannot function. Everyone and everything needs water to survive. Water is our most important resource that is required to ensure our survival. This resource is something that we use every day in our lives and it serves many different purposes. We use water to take showers, to flush the toilet, cook dinner, to drink, and to clean. It is used in agriculture, industries, transportation, and as an alternative energy source (eg electricity). Some plants and fish are made up of 90% of water. There are many reasons why water is important to all living organisms. Metabolic role of water -Hydrolysis: Hydrolysis is the reaction of a compound with water,usually resulting in the formation of one or more new compounds. Hydrolysis is an important reaction in plants and animals. The action of certain enzymes allows the hydrolysis of proteins, fats, oils, and carbohydrates. Medium for chemical reactions: All chemical reactions take place in some kind of liquid medium. Diffusion and Osmosis: Water is necessary for osmosis and diffusion to take place through surfaces, for example in the lungs with oxygen. Photosynthesis: Water is extremely necessary in photosynthesis.Water as a solvent -Water is a good liquid to dissolve other substances into. Transport: The blood plasma, tissue fluid and lymph is mostly made up of water. Therefore it is a good place for substances...
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