Why can t humans leave the air

It's not air, it's oxygen, because the human lungs need oxygen to run without oxygen! If the lungs don't run, the heart stops, and the person dies.

If you don't breathe, you'll hang.。。 Without air, there would be no us humans.

Why do people need air to survive? As a result of long-term evolution, oxygen alone is not enough, it must be standard air, and the proportions of various components must be adapted to the needs of human beings.

Remember, why do people breathe air? The air inhaled by a person is 78 100 nitrogen (not for breathing), 21 100 for oxygen (for breathing) and 1 100 for rare gases, including carbon dioxide, which travels to the lungs through the pulmonary veins to support your movement! After coming out, the air has more carbon dioxide and less oxygen!

Oxygen is drawn into the lungs and exchanged with the capillaries of the lungs for gas exchange (oxygen in the alveoli and carbon dioxide in the capillaries are exchanged in the morning), and then the blood vessels carry fresh oxygen to all parts of the body, and the exchanged carbon dioxide is spit out. After coming out, the air has more carbon dioxide and less oxygen! And so on many times.

Oxygen enters the human blood, body fluids, tissue fluids, cells, inhaled exhaust gases, and metabolic waste products are excreted from the body

Why do humans need air Because humans need oxygen to keep their bodies alive, and the oxygen content in the air is the highest.

Why do people need air to live The earth has a history of more than 4.6 billion years, and initially the earth was just a "naked ball" (without an atmosphere) like the moon, and later due to various factors (mainly volcanic eruptions spewing a large amount of gas from the ground) produced a primitive atmosphere, which was basically toxic gases. Later, life arose on Earth, and there were plants that evolved green to photosynthesize, and since then there has been more and more oxygen in the atmosphere. Then human beings appeared (after a perfect atmosphere has been formed), which appeared by natural selection in all aspects, and there are its accidents and their inevitable spine, in which human beings can survive in the atmosphere and use the oxygen in the air to breathe is the inevitable result, otherwise there will be no human existence Therefore, human beings must need air to live, which is the result of natural selection for hundreds of millions of years.

Ask why people must have air in order to survive. From a microscopic point of view, every cell in your body must undergo aerobic respiration as long as it is alive, and aerobic respiration must require oxygen, so human beings must have fingers permeating air to survive. In fact, not only humans, but also aerobic organisms must have oxygen to survive.

And there is carbon dioxide in the products of aerobic respiration, so there must be carbon dioxide in the human body; In addition, the air you breathe in contains not only oxygen, but also carbon dioxide!

People want air? Because there is no going to die!

Here's what you can do with air:1. For humans and animals to breathe.

2. Help the flame burn.

3. All engines, such as Tannadig cars, airplanes, machinery, etc., must have air entering to operate.

4. The flow of air can help the human body to dissipate heat sensitively, replace indoor air, and improve the environment.

5. Propagate sound, and you can't hear the sound without letting the nuclear air have it.

6. It can generate lift to make the aircraft fly.

7. Generate resistance to make the parachute fall slowly.

Other things you can do with airThe flow of air produces wind, and now that people have mastered wind power generation, modern people have mastered the technology of using air flow to generate electricity. It is understood that aerodynamic generator technology is a new generation of clean energy power generation technology after wind power generation and photovoltaic power generation.

Converting air heat energy into electrical energy has many advantages such as zero emission, zero pollution, natural clean, green environmental protection, small footprint, low investment cost, short construction cycle, and wide use.

Because the air contains nitrogen, oxygen, noble gases and other substances, it belongs to the mixture; Human beings are inseparable from the air all the time, because the oxygen in the air can supply breathing The main causes of air pollution: such as factory exhaust gases, the combustion of fossil fuels, and the exhaust gases emitted by aircraft, automobiles and other vehicles; It is recommended to consider the source of pollution, such as reducing the use of fossil fuels, increasing environmental greening, and strengthening air quality monitoring

So the answer is: mixture; supply breathing; Reduce the use of fossil fuels, increase environmental greening, and strengthen air quality monitoring.

Because the earth has an atmosphere, humans and all kinds of living things can breathe. Nitrogen (N2) has the largest proportion in the earth's atmosphere, accounting for about 78, and it is an indispensable fertilizer for plant growth**; The second is oxygen (O2), which accounts for about 21, and humans and all living things depend on it for respiration, and it is also an element of combustion; Argon (AR) is in third place, and there are also very small amounts of carbon dioxide, neon, helium, methane, nitrogen dioxide, hydrogen, etc., which together are less than one thousandth. The ratio of nitrogen, oxygen and argon content is stable and does not change until an altitude of more than 90 km.

It is important to note that modern human activities are influencing changes in the composition of the atmosphere.

Because the atmosphere can not only allow sunlight to pass through, but also properly retain a certain amount of heat on the earth, in order to regulate the temperature on the earth and make everything prosperous.

The atmosphere is like the armor of the earth. If you have seen the moon's **, you will find that its surface is full of smashed marks, that is, thousands of meteorites fell from the sky "masterpieces". And when these meteorites hit the earth and pass through the atmosphere, most of them burn into beautiful meteors, and even if a few fall to the ground, they are exhausted by the friction with the atmosphere, and they will not cause much harm to humans.

The earth is particularly proud of the fact that there is a layer of ozone (O3) above the atmosphere, which is a colorless but peculiar smelly gas, which is the umbrella of life. The sun's ultraviolet rays and various cosmic rays in interstellar space can harm life. The ozone layer absorbs a large amount of ultraviolet light, and the atmosphere cuts the initial enormous energy of cosmic rays.

There was a "Uncle Martin" from Mars on TV, which is of course a science fiction story, if there are "Martians", then they can only live in a hole in the ground, because there is no ozone layer in the upper layer of Mars, and strong and long-lasting ultraviolet radiation will definitely cause them to suffer from terrible cancer. In recent years, the earth's ozone layer is being destroyed due to the rise of atmospheric pollutants into the sky, and how to protect the ozone layer is an urgent issue facing mankind.

Air is an important condition for human survival.

People live in the ocean of air, and they breathe air all the time in their lives. Adults breathe about 10,000 litres of air a day, which is equivalent to 13.6 kilograms, which is about 10 times the weight of food in a day and 5-6 times the amount of water intake. If a person does not eat for 10 days he does not die, he does not die if he does not drink water for 5 days, but he dies immediately if he does not breathe for 5 minutes.

Therefore, a very important condition for human beings to be able to produce and reproduce on the earth is that the earth has a unique atmospheric environment, which enables the earth to maintain a temperature and humidity suitable for the growth of all human beings.

Because people have to exchange gases.

It's the exchange of oxygen.

I've tried a test before.

It is to cover the head with a relatively large airtight bag.

As a result, after exhaling a few times, I can't breathe in anymore.

It's uncomfortable, so.

People need oxygen, not air.

Air is the medium through which we carry out our gas exchange.

The reason is that we need oxygen to also respirate in the body.

Humans are higher animals and need energy to maintain normal physiological needs.

Where does the energy come from?

Burning can produce heat because of the chemical reaction between oxygen and charcoal or hydrogen.

The same is true of the human body.

Breathing air is inhaling oxygen.

When oxygen reaches the lungs, it dissolves in the blood.

The blood circulation brings oxygen to the tissues for use, produces carbon dioxide, and then brings it from the blood to the lungs, and exhales out, so breathing is mainly for gas exchange, and the human body must breathe to maintain its own life activities.

Because there is oxygen in the air that humans need, and all the energy-related reactions in the human body require the participation of oxygen. Therefore, if human beings do not have air, they cannot breathe and cannot survive.

There is no oxygen without air.

Whereas, oxygen has the following uses.

Oxygen is the key substance for the human body to metabolize and is the first need for human life activities. The oxygen that is breathed is converted into oxygen that is available in the body, called blood oxygen. The blood carries blood oxygen to the whole body to feed energy, and the amount of blood oxygen delivered is closely related to the working state of the heart and brain.

The better the heart pumps, the higher the amount of oxygen in the blood; The stronger the blood transfusion capacity of the coronary arteries of the heart, the higher the concentration of blood oxygen delivered to the heart, brain and the whole body, and the better the operation of the vital organs of the human body.

Humans are animals and need the energy of the chain to maintain normal physiological needs.

Where does the ruler come from?

For example, a fire can produce heat because of a chemical reaction between oxygen and charcoal or hydrogen.

The same is true of the human body.

Breathing air is inhaling oxygen.

After the oxygen reaches the lungs, it dissolves in the blood, and then the blood circulation carries the oxygen to the tissues for use, and the carbon dioxide produced is carried from the blood to the lungs and exhaled.

Therefore, breathing is mainly a movement of gas exchange, and the human body must breathe to maintain its own life activities!

It is an animal that needs energy to maintain normal physiological needs.

Where does the energy come from?

For example, a fire can produce heat because of a chemical reaction between oxygen and charcoal or hydrogen.

The human body is the same.

Breathing air is inhaling oxygen.

After the oxygen reaches the lungs, it dissolves in the blood, and then the blood circulation brings the oxygen to the tissues for use, and the resulting dioxan celery charcoal is then carried from the blood to the lungs and exhaled.

This is because all the activities that the human body performs must be supplied with energy. Energy** in food. Specifically, energy is in the three major nutrients of sugar, fat, and protein.

However, they must be released through oxidative decomposition, and oxygen is necessary for oxidation, and oxygen is stored in very little in our body, only enough for a few minutes. Therefore, the oxygen needed to oxygenate the three major nutrients must be continuously ingested from the outside world through breathing. At the same time, if our brain cells are deprived of oxygen for about 6 minutes, we will suffer fatal damage, and the heart will stop beating after 10 minutes of hypoxia.

Therefore, breathing cannot be stopped for a moment. When the three major nutrients are oxidized in the body, a large amount of carbon dioxide will be produced, just like the substances are burned in nature and emit black smoke, which is harmful to the human body. When a large amount of carbon dioxide accumulates in the human body, people will feel dizzy, headache, pouting, and even cause serious consequences such as central paralysis.

Therefore, we must breathe all the time, breathe out the old and absorb the new, inhale fresh oxygen, and discharge carbon dioxide in order to ensure the normal life activities of the human body.

Man and Air Scientific experiments have proven that without air, there would be no life, no plants, no animals, and no human beings. Air is a gas that is closely related to human beings. The air that covers the earth is about 1,000 kilometers thick and is divided into five levels:

Troposphere, stratosphere, mesosphere, warm layer, fugitive layer. Among them, the troposphere is the most important part of the atmosphere and has the closest relationship with humans. It contains 70%-75% of atmospheric substances, (oxygen, nitrogen, carbon dioxide and other gases, solid particles) and all water vapor in the atmosphere, and all kinds of pollutants emitted by humans and nature are mainly concentrated here.

The troposphere has a direct impact on the survival of life on Earth. The stratosphere (ozone layer) absorbs large amounts of ultraviolet rays and protects humans from harm. The other three layers also have their own functions, so humans are accustomed to comparing the atmosphere to the earth's umbrella.

However, today, when human beings look at the air that is closely related to our lives with a rational eye, they find that the air has become dirty. Clean air contains 78% nitrogen, 21% oxygen, carbon dioxide, noble gases, other harmful gases and impurities. This ratio is very stable when the atmosphere is not polluted.

But now the air has been destroyed by humans, and its composition has changed. The main causes of air pollution are dust particles, magnetics, oxides, halides, organic compounds and other substances. At present, 1 billion tons of pollutants enter the atmosphere every year in the world, which will seriously affect the survival of human beings.

Air pollution directly endangers human health, causes the occurrence of many human diseases, leads to respiratory diseases, and can even cause direct poisoning and death. Air pollution also causes the destruction of forests and other organisms, causes anomalies in the Earth's climate, and makes the "greenhouse effect" prominent. While the air benefits mankind, once it is polluted, the harm to human beings will be serious.

We should protect the environment and clean the air. Let the beautiful cloak of air recognise the earth, so that we humans can continue to live and reproduce.