Water in human life. Biological and environmental significance of water
Water is the source of life on Earth, a great natural value, covering 71% of the surface of our planet, the most common chemical compound and the necessary basis for the existence of all life on the planet. The high content in plants (up to 90%) and in the human body (about 70%) only confirms the importance of this component, which has no taste, smell or color.
Water is life!
The role of water in human life is invaluable: it is used for drinking, food, washing, various household and industrial needs. Water is life!The role of water in human life can be determined by the share it occupies in the body and organs, each cell of which is rich in an aqueous solution of the necessary nutrients. Water is one of the most effective means of physical education, which is widely used for personal hygiene, recreational exercise, hardening, water sports.
Biochemical properties of water
Preservation of elasticity and volume of a living cell would be impossible without water, as well as a significant part of the chemical reactions of the body, occurring in water solutions. Irreplaceable so valuable liquid makes its thermal conductivity and heat capacity, which provides thermoregulation and protects against temperature drops.Water in human life is capable of dissolving certain acids, bases and salts, representing ionic compounds and some polar non-ionic formations (simple alcohols, amino acids, sugars), called hydrophilic (from the Greek. Literally - the tendency to moisture). Nucleic acids, fats, proteins and some polysaccharides - hydrophobic substances (from the Greek. - fear of moisture) are not capable of liquid.
The biological significance of water is quite large, since this invaluable fluid is the main medium during internal processes in the body. As a percentage, the presence of water in the body is as follows:
Up to 28
Up to 69
Up to 82
Up to 85
Interesting sayings about water
Interestingly, the statement by science fiction writer V. Savchenko, with one phrase that revealed the importance of water, is interesting: a person has much more motivation to consider himself a liquid, unlike, for example, 40% sodium solution. A popular joke among biologists is that water has “invented” man as a means of its own movement, the main component of the organism of which it is. 2/3 of its total amount is contained inside the cells and is referred to as “intracellular” or “structured” fluid, which is capable of ensuring the body’s resistance to the influence of negative environmental factors. The third part of the water is outside the cells, with 20% of this amount being the extracellular fluid itself, 2% and 8%, respectively, of lymph and blood plasma.
The value of water in human life
The value of the natural component in life and in life is simply invaluable, since without it existence in principle is impossible.
Water is necessary for life because:
- moisturizes inhaled oxygen;
- helps the body in the qualitative assimilation of nutrients;
- contributes to the transformation of food into energy and normal digestion;
- participates in the passing metabolism and chemical reactions;
- removes excess salts, slags and toxins;
- debugs body temperature;
- provides skin elasticity;
- regulates blood pressure;
- prevents the occurrence of kidney stones;
- is a kind of “lubricant” for the joints and a shock absorber for the spinal cord;
- protects vital organs.
The water cycle in the body
One of the conditions for the existence of all living things is a constant water content, the amount of which the body enters depends on the lifestyle of a person, his age, physical health, and environmental factors. During the day, up to 6% of the water in the body is exchanged; within 10 days half of its total is updated. So, per day, the body loses water about 150 ml with feces, about 500 ml with exhaled air and the same amount with sweat and 1.5 liters is excreted in the urine. Approximately the same amount of water (about 3 liters per day) a person gets back. Of these, one third of a liter is formed in the body itself during biochemical processes, and about 2 liters are consumed with food and beverages, and the daily requirement for exclusively drinking water is about 1.5 liters.
Recently, experts have calculated that a person still has to drink water in its pure form about 2 liters per day to prevent even the slightest dehydration of the body. The same amount is recommended to consume yogis who know the true meaning of air and water. An absolutely healthy human body should ideally have a state of water balance, otherwise known as water balance.
By the way, German scientists, after a series of experiments conducted on students, found out that those who drink the most water and drinks show greater consistency and aptitude for creativity. Water in a person's life plays a motivating role, filling it with energy and vitality.
According to some estimates, over 60 years of life, an average person drinks about 50 tons of water, which is comparable with practically the whole tank. It is interesting to know that ordinary food consists of half of water: in meat it is up to 67%, in cereals - 80%, vegetables and fruits contain up to 90%, bread - about 50%.
Situations of increased water consumption
Usually a person gets about 2-3 liters of water per day, but there are situations in which the need for it increases. It:
- Increased body temperature (more than 37°C) With each increasing degree of water, 10% more is required of the total amount..
- Hard physical work in the open air, in which fluids need to drink 5 - 6 liters.
- Work in hot shops - up to 15 liters.
Deficiency of valuable fluid is the cause of many diseases: allergies, asthma, overweight, high blood pressure, emotional problems (including depression), and its absence leads to disruption of all body functions, undermining health and making it vulnerable to diseases.
Loss of water up to 2% of the total body mass (1 - 1.5 liters) will cause a person to feel thirst; a loss of 6–8% will lead to a faint and dizzy; 10% will cause the appearance of hallucinations and a violation of swallowing function. Depriving 12% of water from total body weight will result in death If without food a person is able to survive for about 50 days, provided drinking water is consumed, then without it - a maximum of 5 days.
In fact, most people drink less water than the recommended amount: only a third, and the resulting ailments are not at all associated with a lack of fluid.
Signs of lack of water in the body
The first signs of dehydration:
- peeling and dryness of the skin;
- tiredness and lethargy;
- pain in the joints and back;
- decrease in working capacity;
- violation of the digestive and circulatory processes,
- an increase in blood viscosity and, as a consequence, an increased risk of thrombosis.
Stable intake of water in the body in the required amount helps to ensure vitality, getting rid of ailments and many serious diseases, improve thinking and coordination of the brain. Therefore, the emerging thirst should always try to quench. It is better to drink it often and gradually, as a large amount of fluid with the purpose of one-time replenishment of the daily norm is completely absorbed into the bloodstream, which will give a noticeable load on the heart until the time the water is removed from the body by the kidneys.
The body's water balance is a direct path to health.
In other words, water in a person’s life with a properly organized drinking regime can create acceptable conditions for maintaining the necessary water balance. It is important that the liquid was of high quality, with the presence of the necessary minerals. Paradoxical is the situation of the modern world: water, the source of life on Earth, can be dangerous for life itself, carrying with every drop a variety of infections.That is, only clean water can be beneficial for the organism, the quality problem of which is very relevant in the modern world.
Lack of water - the terrible future of the planet
Rather, the problem of the availability of drinking water itself is becoming vital, turning every day into an increasingly scarce product. Moreover, the importance of water on Earth and its lack of international relations are discussed at the highest level and often in a conflicting way.Now more than 40 countries lack water due to the aridity of many regions. In 15-20 years, even according to the most optimistic forecasts, every person will understand the importance of water on Earth, since the problem of its shortage will affect 60-70% of the world's population. In developing countries, the water deficit will increase by 50%, in developed countries - by 18%. As a result, international tensions around water scarcity will increase.
Contaminated water as a result of human activity
This is due to geophysical conditions, human economic activity, often ill-conceived and irresponsible, which significantly increases the load on water resources and leads to their pollution.A huge amount of water goes to the needs of cities and industries, which not only consume, but also pollute water, dumping about 2 million tons of waste into water bodies every day. The same applies to agriculture, in which millions of tons of waste products and fertilizers flow into reservoirs from farms and fields. In Europe, out of 55 rivers, only 5 are considered clean, while in Asia all rivers are extremely littered with agricultural waste and metals. In China, 550 out of 600 cities experience water shortages; Because of the strong pollution in the reservoirs, fish do not survive, and some rivers that flow into the ocean simply do not flow to it.
What flows from the taps
And why go far, if the quality of water, which leaves much to be desired, concerns almost every person. The importance of water in a person’s life is great, especially when it is consumed, when sanitary standards run counter to the quality of the liquid consumed, in which there are harmful pesticides, nitrites, petroleum products, and heavy metal salts. Half of the population receives hazardous water, causing about 80% of all known diseases.
Chlorine is dangerous!
To avoid possible infection with any infection, water is chlorinated, which does not diminish the danger. On the contrary, chlorine, which destroys many dangerous microbes, forms unhealthy chemical compounds and provokes such diseases as gastritis, pneumonia, and oncology. When boiling, he does not have time to dissolve completely and combines with organic substances always present in water. At the same time dioxins are formed - very dangerous poisons, surpassing even cyanic potassium in their strength.Water poisoning is much worse than food poisoning, because water in a person’s life, unlike food, takes part in all biochemical processes of the body. Dioxins accumulated in the body, decompose very slowly, almost decades. By causing violations of the endocrine system, reproductive functions, they destroy the immune system, cause cancer and genetic abnormalities. Chlorine is the most dangerous killer of our time: killing one disease, it gives rise to another, even worse. After the global chlorination of water began in 1944, epidemics of heart disease, dementia and cancer began to manifest themselves on a massive scale. The risk of cancer is 93% greater than those who drink non-chlorinated water.There is only one conclusion: you shouldn’t drink water from the tap. The ecological significance of water is the No. 1 problem in the world, since there will be no water — there will be no life on Earth. Therefore, a prerequisite for the preservation of health is its cleaning and compliance with sanitary and epidemiological standards.