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Explain How the Properties of Water Make It Suited To Its Functions In the Bodies of Living Organisms .

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Introduction

EXPLAIN HOW THE PROPERTIES OF WATER MAKE IT SUITED TO (A) ITS FUNCTIONS IN THE BODIES OF LIVING ORGANISMS Water is useful in a variety of different ways. The first of these being its solvency. Because the oxygen atom in water has a greater pull on the shared electrons than the hydrogen atoms, this gives two seperate charged areas. So substances that have an electrostatic charge are attracted to the charges on water molecules, allowing them to dissolve. This allows molecules like nutrients to be dissolved in water, and be actively transported around an organism. The solvency of water is also useful for digestion in organisms. Using hydrolysis to break down disaccharides and polysaccharides into monosaccharides by adding water. The use of water in digestion can be attributed to another of its properties. Water can be heated into the gaseous form of water vapour, which removes water from its liquid state. This process of condensation helps reverse the process of hydrolysis, and allows monosaccharides to bond into disaccharides and polysaccharides. Although water can be heated into water vapour, it does have a very high heat capacity in which it takes a large amount of energy to change its temperature. ...read more.

Middle

Creating a water column through the plant. The viscosity of water is low. This allows it to move about with ease. Without this, it wouldnt matter if nutrients could dissolve into it, or if it was small enough to pass from cell to cell. The fact that water is bonded together so easily, allows it to be used in all the different ways I have already highlighted. Water is transparent,and this, believe it or not(!), allows our eyes to function. The transparency of water allows it to be used as a cleaning compound on an organisms eyes, without trapping any of the light rays that before they reach the pupil. EXPLAIN HOW THE PROPERTIES OF WATER MAKE IT SUITED (B) AS AN ENVIRONMENT FOR ORGANISMS TO LIVE IN The properties of water are essential for organisms to live in for a variety of reasons. The one that is most evident is its transparencey. The fact that light can travel through it allowed marine life millions of years ago to develop a more sophisticated detection device other than sonar, sight. ...read more.

Conclusion

Most organisms require a stable temperature as part of there environment, and water has a very high heat capacity. A large increase in heat results in a small rise in the water temperature. Keeping the water temperature fairly constant, allowing organisms to keep within there required temperature ranges. Waters thermal capacities are also important on a more grand scale. The fact that water has a high boiling point for a molecule so small means that water can exist on many areas of the earth, and thus allow life to thrive in abundance. The surface film formed between air and water is due to waters high surface tension. This is caused by the polarity of water that causes the surface of water to contract to occupy the smallest possible area. This is the basis for a habitat for organisms that live on top of the water like pond skaters, whirlig beetles and raft spiders. Water is 800 times denser than air. And although the density of water causes more friction for organisms moving or swimming through it than air. This property is also suited towards organisms because it supports them. Therefore it is easier for some of the larger organisms to support their weight. ...read more.

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