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The Roles Of Water In Living Organisms And As An Environment For The Organisms

797 words - 3 pages

The Roles of Water in Living Organisms and as an Environment for the Organisms

Without water there would be no life on Earth; this is why water is
the most important biochemical of all.

In "Human Biology" by J.M Orten and O.W. Nevhans, it is suggested that
70% of all body weight is water, most of which is found in three major
compartments: 70% intracellular fluid, 20% interstitial fluid (lymph)
and 7% blood plasma, and only 3% in other compartments. By volume,
nearly a half of each of our organs consist of water; amounting to
approximately 10 gallons of water, of which most is in our cells.

Water is crucial for cells to function healthily and for all chemical
reactions and transport processes to occur. Water is responsible for
maintaining cell structure, aiding metabolism and helping the
circulation of blood and bodily fluids; water is also responsible for
removing bodily waste through excretion.

Water is effective in neutralising the blood, for example, if the
blood is too acidic it is likely the body will suffer from high
pressure, this is when water is required to control the acid level of
the blood.

Another important process involving water is homeostasis. This is when
the body maintains a constant internal environment, including, the
regulation of glucose concentration, metabolic wastes, temperature and
pH. Water helps to keep the body temperature constant when: the eaten
food inside the body is turned into heat energy, this is then turned
into action energy for all the daily activities we participate in,
but, if the heat builds up, spinal nerves send the signal of
"thirstiness" and we naturally consume water to maintain a regular

An increased amount of water leads to an increased amount of chemical
activity within the cell because ions and polar molecules are
attracted to water molecules, collecting and separating around them,
helping chemicals to dissolve in water. Once a chemical is in a
solution. It is able to move around freely and react with other

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