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"The Importance of Water and its Properties for Living Organisms"

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"The Importance of Water and its Properties for Living Organisms" Next to oxygen, water is essential for all living organisms on Earth. It is a major component in cells, which make up all living organisms; therefore approximately 60% to 95% of living organisms are water. Water molecules are dipolar (meaning that its electrons are not shared equally due to covalent bonding) and this generates hydrogen bonding between atoms. As a result its structure gives water many important properties such as its thermal, high surface tension, incompressibility and cohesiveness, which give it many useful biological roles such as being a solvent, a coolant, an insulator, as support, a lubricant and a reagent. Moreover water is used in chemical reactions, transporting and it provides a suitable environment for aquatic animals to habitat. ...read more.


It has a high latent heat of vaporization (meaning a lot of heat is needed to turn it from a liquid to a gas). For example when humans sweat, heat energy from the body evaporates the water in sweat, which cools us down. Insulation is especially important for organisms that live in the water during cold seasons. For instance as the temperature drops water on the surface of a pond would freeze and ice would form on the surface. This acts as an insulator, allowing aquatic animals to survive. Water is a solvent for ions and polar molecules since they are attracted to them can separate them and therefore dissolve them. Since water has the ability to dissolve so many substances, it is a useful medium for transportation in animals and plants, such as blood plasma, lymph, and tissue fluid. ...read more.


There are metabolic roles of water as a reagent; in particular hydrolysis uses water to hydrolysis substances such as protein to amino acids and polysaccharides to monosaccharides. For diffusion and osmosis, water is vital for the diffusion of materials across the lungs and alimentary canal. There is also the process of photosynthesis, which cannot be performed with out the presence of water. To conclude water is a crucial element and it is the main constituent for all living organisms. Its unique structure gives it properties that subsequently give it many various biological roles. Without water we would not be able to obtain oxygen, which is created by photosynthesis, or be able to remove waste from our bodies. Water even provides a supportive habitat for organism like a whale which is just too large to move on land. ...read more.

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