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The Biological Importance of Water.

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Introduction

The Biological Importance of Water Water is the major constituent of living matter. From 50 to 90 percent of the weight of living organisms is water. Protoplasm, the basic material of living cells, consists of a solution in water of fats, carbohydrates, proteins, salts, and similar chemicals. Water acts as a solvent, transporting, combining, and chemically breaking down these substances. Blood in animals and sap in plants consist largely of water and serve to transport food and remove waste material. Water also plays a key role in the metabolic breakdown of such essential molecules as proteins and carbohydrates. This process, called hydrolysis, goes on continually in living cells. ...read more.

Middle

This is useful in the winter for marine animals, if a pond, lake or even the ocean freezes, the ice on top acts as an insulator keeping the water a temperature the animals can bare. Water has small positive charges on the hydrogen and a small negative charge on the oxygen. This makes water a polar molecule. the polar nature is important to many properties of water. when molecules of water are together the positive charges of oxygen are attracted to negative charges of oxygen and hydrogen bonds are formed. They are formed because the molecules are not linear so it is a polar molecule, meaning it can attract other molecules. ...read more.

Conclusion

Much of the heat that is absorbed is used to break down the hydrogen bonds that hold the water molecule together. This is very important to human beings because we can adapt to hot countries very easily. The heat is absorbed into the water instead of raising the bloods temperature which would probably kill us. Because of water's strong hydrostatic forces water is incompressible. This provides support for soft-bodied creatures such as worms, slugs and jellyfish which therefore do not require a supporting skeletal system. Water allows cells filled with water to become turgid and due to its incompressibility plants can support themselves In conclusion water's unique properties make it perhaps the most biologically important substance on the planet. No other substance shares similar properties to water and in the way that one single molecule can possess such varied and essential characteristics. ...read more.

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