Why do people need oxygen, what is the reason?

The body needs energy to maintain normal metabolic activity.

For example, the maintenance of the function of Na-K-ATPase on the cell membrane consumes a lot of energy in the body, and if the energy is insufficient, the activity of the enzyme will decrease, the intracellular NA will increase, and the cell will be edema and necrosis.

The vast majority of other metabolic reactions require energy.

However, in the process of energy production by the body, it is necessary to metabolize organic matter into water and carbon dioxide and release energy, and the final realization of this process requires the participation of oxygen.

Therefore, without oxygen, the tissues are hypoxic, the body cannot produce enough energy, the metabolism cannot be maintained, and the organism dies.

This is also the result of a long evolutionary process.

Oxygen is needed to break down the food they eat.

People need oxygen, when people eat food, for example, it is converted into glucose, which reacts with oxygen under the action of enzymes, releases heat to maintain the survival of the human body, and produces carbon dioxide, which is excreted from the body, so oxygen is necessary.

People can't breathe without oxygen, and they can't live if they can't breathe, just like a fish can't live without a truth.

Not only do people need oxygen, but many animals and plants in the world also need such precious gases, which is called ecological balance.

Yes! It's good to be able to breathe!

And most importantly, in addition to being able to breathe oxygen, other gases are not suitable for our bodies! Right!

Because, there is the most oxygen on the earth, and human beings have to adapt to this environment in order to survive.

After so many years, so later human beings are inseparable from oxygen.

Just as a fish can't live without water, a bird can't live without a sky.

You can try without breathing, and natural phenomena cannot be explained, just like why you eat, drink, and go to the toilet.

Most of the substances ingested by people are carbohydrates, which are converted into sugars, which must be converted into energy in the case of oxygen, and what people want is energy, which is the main one, and there are many aspects.

Nutrients need to be oxidized to release energy, which is the same as when burning and exothermic. It's just that in the human body, the combustion comes gently. With energy, there is a lively you

There are only two words: energy and matter.

Because of the metabolic needs of the person, the normal metabolic flow through the tricarboxylic acid cycle, the cells need aerobic respiration.

The simplest thing is: people need aerobic breathing. Why aerobic respiration? Because people need energy, and where does that energy come from? It is obtained by the redox reaction of oxygen and organic matter!

Human cells need oxygen to oxidize nutrients and release energy.

Humans can't do without oxygen, so why do some people say it's a "chronic poison"? Hear what the scientists have to say!

The reason why human beings can survive on the earth is mainly because there are a large number of flowing water resources on the earth, suitable temperature and air, all of which are indispensable, and if there is no one, there will be no other life on the earth. Water is the source of human life, we can't do without water in our daily life, whether we need water for washing clothes and cooking, if people don't have water, it is almost difficult to continue to survive.

There are places in Africa where water is severely scarce, and they value water more than money, and only those who are desperately short of water know how important water is. If there is no suitable temperature on the earth, the environment is extremely harsh, and it is difficult for organisms to survive. Fortunately, having the right temperature on this earth can make our life more comfortable.

Finally, there is oxygen, all living things on earth cannot do without oxygen, without oxygen, all life will end. Oxygen is needed for both unicellular and multicellular organisms.

We humans are the same, we have to breathe all the time, and after a few seconds of running out of oxygen, we die of suffocation. It can be seen that oxygen is relevant and important to us humans, but some people say that oxygen is a chronic poison, what is the reason for this? Scientists have found that oxygen can "kill" almost every 80 years, and many people feel more depressed when they see this, almost everyone needs to absorb oxygen, why does it still kill humans?

The air on Earth is not as clean and clear as we think, there are other gases besides oxygen, and if there is too much oxygen on Earth, human beings may die out due to excessive oxygen enrichment. I don't know if you have ever noticed such a situation, the older people around you will buy some antioxidant skin care products, mainly because they prevent themselves from aging more slowly.

Many antioxidant items on the market do not work, it is impossible to completely remove them, everyone has to face aging, rebellion will cause greater damage, the effect of oxidation is mainly that oxygen atoms become free radicals after metabolism in the human body, when they reach a certain stage, human beings begin to slowly age. Scientists have made unexpected discoveries when researching, every human life expectancy is about 70 years old, and once humans enter about 70 to 80 years old, they will generally die.

Humans need to absorb oxygen for us to survive and exhale carbon dioxide. It is precisely because of this that when we go to a place at a high altitude, it will cause breathing difficulties due to lack of oxygen, and in severe cases, it can be fatal.

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 human body needs oxygen because it plays a key role in the body. Oxygen is necessary to sustain life, and the cells of the human body need oxygen to produce energy, a process that is renamed cellular respiration by Xiaoque. During cellular respiration, oxygen combines with nutrients in food to produce energy and carbon dioxide.

The body needs to get carbon dioxide out of the body and is constantly taking in new oxygen to maintain this process. If the body lacks oxygen, it will cause the cells to fail to function properly, affecting various functions of the body, and in severe cases, it can be life-threatening.

Human activities require energy, and energy is produced by aerobic respiration, which produces a lot of energy and consumes oxygen and glucose. The vast majority of living things depend on oxygen to survive.

Not only humans, but most of the creatures on the earth now need oxygen.

In the early days of life on Earth, oxygen was not needed. Because there was no oxygen on the earth at that time, all the creatures at that time were anaerobic organisms. The final electron acceptor in the respiratory chain of these anaerobic organisms is metal ions.

When some of these organisms evolved photosynthesis, oxygen was emitted as metabolic waste, and oxygen appeared on Earth. At this time, oxygen is toxic to most living things. However, living beings have strong vitality, and many organisms have evolved the ability to adapt to oxygen, using oxygen as an acceptor for electrons in the respiratory chain of wisdom, which is used to bind with hydrogen ions to form water.

That's why living things need oxygen.

To this day, oxygen is only used as the ultimate receptor for electron transport in the biological respiratory chain, and nothing else.