How is water good for us? Detailed answer

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How is water good for us? Detailed answer

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How is water useful for us?

If a biologist is asked to compile a list of the most necessary things for life, then water, of course, tops this list. Without it, none of the known forms of life is completely impossible. The life of every cell of both plants and animals depends on the presence of this fluid. As you may already know, for every 4,5 kilograms of your body weight, there are 3 kilograms (liters) of water. The same can be said about many other living beings. Without water, a person soon dies. Why is it so? Why is water essential for life?

The main reason that every living being needs water to sustain life is that living cells - these main elements that make up all living things - necessarily include water molecules. During the day, an adult consumes about two liters of water in the form of drinks and one liter - as part of the so-called solid food: in fruits, vegetables, bread, meat, etc., which are not absolutely dry foods, but contain from thirty to ninety percent water.

In addition to these three liters, which enter the human body during the day from the outside, it contains about ten more liters circulating between its various organs. About five liters of blood are constantly in the blood vessels of the body, and three liters of this amount are water. This ratio, like the quantity itself, never changes. Even when a tourist drinks four liters of liquid after a long journey on a hot summer day, there will still be three liters of water in his blood vessels.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How much does the weight of a body at the Earth's equator differ from the weight of the same body at the poles?

The weight of any physical body depends on the geographical latitude at which it is located. This is due to the combined action of two factors: the non-sphericity (oblateness at the poles) of our planet and its daily rotation.

With an increase in geographical latitude, the main component of weight (gravitational attraction, determined by the distance between the centers of mass of the Earth and the weighed body) increases, and the centrifugal effect, leading to weight loss, decreases.

Thus, any body has a minimum weight at the equator, a maximum - at the North Pole (a hill extends at the South Pole, and gravity weakens with distance from the center of the Earth). The difference between the indicated minimum and maximum body weights is approximately 0,5 percent. A product weighing a ton at the equator would add 5 kilograms in weight if it were delivered to the North Pole.

When carrying things to the Pole from other latitudes, the weight gain is less, but for large loads it can still be expressed in impressive numbers. Thus, the cargo of a sea vessel weighing 20 thousand tons in the middle latitudes would add 50 tons in weight if this vessel reached the North Pole. The cargo of an aircraft weighing 24 tons in Moscow would become 50 kilograms heavier after landing at the North Pole.

You can only detect such "increases" with the help of spring balances, because on the scales of lever weights, too, they become correspondingly heavier.

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