Why does the oxygen inhaled and exhaled become carbon dioxide?

Oxygen is what we need to breathe every day, and the air on Earth is like a system where humans absorb oxygen and spit out carbon dioxide every day.

At the same time, plants absorb carbon dioxide and convert it into oxygen, and many people will wonder why people inhale oxygen and exhale it into carbon dioxide. Actually, it's because something happens in the human bodyChemical reactions, and the decomposition of oxygen and so on, these reorganizations become carbon dioxide, let's find out.

There are many complex organs in the human body, they all have their own functions, such as our tongue can help us taste the taste of food, and the liver can secrete some hormones, etc., and some chemical reactions are actually happening in the body every day, we learned the law of conservation of elements in chemistry books in high school.

To put it simply, everything is converted into other substances, but the total amount of elements does not change, and all the oxygen we breathe in will eventually be due to some chemical elements in the body.

There are also chemical reactions such as the environment, and finally carbon dioxide is obtained.

In fact, the human body is very complex, much like an ecosystem.

Our organs can be seen as the building blocks of the ecosystem, such as trees and rivers, etc., each of which has its own function, and at the same time cooperates with each other to ensure the integrity of the whole system, and oxygen is the energy that provides a lot of organ activity, and you can see an activator, but it goes through a series of transformations and finally becomes carbon dioxide.

At this time, it is connected to nature, because plants need to absorb carbon dioxide and provide them with carbon.

It grows, and finally returns to the earth with oxygen, and we are absorbing oxygen, so as to form a good ecosystem cycle, so as to ensure our safe and stable development, otherwise it is likely that human beings on the earth will not be able to survive, we think that the first difficulty in the universe is that there is no oxygen, so many times if you want to explore the universe, you need special equipment.

Because when oxygen is inhaled by the nostrils, it enters the trachea, the trachea is divided straight down into two bronchial tubes, the bronchi will continue to subdivide, producing countless very fine branches, each bronchi end is connected to several alveoli, the surface of the alveoli is covered with capillaries, the inhaled fresh oxygen diffuses in the capillaries, as the blood flows to all parts of the human body, the carbon dioxide waste gas produced in the human body also comes to the capillaries, enters the alveoli through gas exchange, and then collects from the bronchi to the trachea. The exhaled breath is then expelled from the body and becomes carbon dioxide exhaust.

Because the cells in the body inhale oxygen, they use the oxygen to metabolize the cells, and after using the carbon dioxide produced, what is exhaled becomes carbon dioxide.

Because in the structure of our lungs, there is an organ responsible for exchanging gases, which is called the lungs, and when oxygen is inhaled through the nostrils, it enters the trachea and is inhaled.

There's carbon dioxide in and out, and oxygen in and out. The gas content in the air is about 79% nitrogen, about 21% oxygen, and carbon dioxide is about After human respiration, gas exchange occurs at the alveoli (using gas diffusion), and the carbon dioxide content increases a little, while the oxygen content decreases a little! So in the exhaled breath of the human breath, about 79% of nitrogen, about 16% of oxygen, and about 4% of carbon dioxide!

What changes is the oxygen in the air.

Oxygen passes through the alveoli into the blood, interstitial fluid, and then into the tissue cells, where aerobic respiration takes place.

First of all, the first and second stages of aerobic respiration do not involve oxygen.

One: In the cytoplasmic matrix, one molecule of glucose is broken down into two molecules of pyruvate, and 4 [H] (activated hydrogen) are removed at the same time; During the breakdown of glucose, a small amount of energy is released, and part of the energy is used to synthesize ATP, producing a small amount of ATP. This stage does not require the involvement of oxygen and is carried out in the cytoplasmic matrix.

Reaction formula: C6H12O6 enzyme 2C3H4O3 (pyruvate) + 4[H] + small amount of energy (2ATP).

2: Pyruvate enters the matrix of mitochondria, and the hydrogen in the two molecules of pyruvate and 6 water molecules are all removed, and a total of 20 [h] are removed, and the acetone is oxidized and decomposed into carbon dioxide; A small amount of energy is released in this process, part of which is used to synthesize ATP, producing a small amount of energy. This stage also does not require the involvement of oxygen and is carried out in the ** stroma.

Reaction formula: 2C3H4O3 (pyruvate) + 6H2O enzyme 20[H]+6CO2 + small amount of energy (2ATP) In the third stage, there is the participation of oxygen

Three: On the inner membrane of the chondria, a total of 24 [H] shedding in the first two stages are combined with 6 O2 produced by absorption from the outside or chloroplast photosynthesis to form water; In this process, a large amount of energy is released, and part of this energy is used to synthesize ATP, producing a large amount of energy. This phase requires the involvement of oxygen and is carried out on the inner membrane of the first chondrium.

Reaction formula: 24[H]+6O2 enzyme 12H2O+Massive energy (34ATP) In the process of aerobic respiration, glucose is completely oxidized and decomposed, and 1mol of glucose is completely oxygenated after decomposition, a total of 2870kJ of energy is released, of which 1161kJ of energy is stored in ATP, and the rest of the energy is lost in the form of heat energy.

Basically, all higher animals mainly decompose organic matter in the body through aerobic respiration to produce energy for basic activities, and only when oxygen ** is insufficient, such as strenuous exercise, anaerobic respiration will be carried out, and there is no aerobic respiration process at this time.

When we breathe, we don't inhale all the oxygen and we don't exhale all the carbon dioxide. In the fresh air inhaled, the oxygen content is only about 20.95 percent, nitrogen and other gases account for 79 percent, and the left and right sides include 0.04 percent carbon dioxide. In the exhaled breath, the oxygen content decreases to about 16 percent, while the carbon dioxide content increases to about 4.4 percent, and the amount of other gases remains the same.

Of the oxygen that people inhale, only a part of the oxygen reacts with nutrients in the body to produce carbon dioxide, and a part of the anaerobic device remains in the blood.

No, there are gases such as carbon dioxide and oxygen in the inhaled air, some of which is absorbed and the rest exhaled with the carbon dioxide.

No conversions at all! The oxygen that a person inhales willAll of them are converted into water. And carbon dioxide is fromDecomposition of organic matter

This mainly comes from the breakdown of glucose, but there are other breakdown processes

Therefore, the relationship between the two is not mutually transformative at all.

By the way, the total amount of carbon dioxide excreted by a person is slightly more than the amount of oxygen inhaled (in terms of molecular numbers), but some of the carbon dioxide is not excreted from the respiratory system.

It is impossible to transform step by step, only partially.

The exhaled air contains less oxygen and more carbon dioxide than air.

Introduction: Breathing is a very normal phenomenon, and humans must breathe as mammals, if there is no way to breathe through the lungs, then human life will be threatened. When you breathe, you breathe in the air, and when you exhale, you breathe out carbon dioxide, why is that?

In fact, the composition of the air is more complex, some of it contains oxygen, some of it contains carbon dioxide, some of it is rare gases, and there are many floating impurities. In daily life, there are some inhalable particles in the air that people breathe through the nose cavity, through the nose hair and some fibers of the trachea, so it can be adsorbed away. In this process, oxygen is what people need, and carbon dioxide is not needed, so that the alveoli can quickly replenish the oxygen in the air, and through the action of blood, oxygen is brought into the blood vessels of various cells and circulated throughout the body, so many cells can also obtain oxygen.

Carbon dioxide is produced in the process of cell operation, and carbon dioxide is also excreted from the body in time through the action of alveoli, so people breathe in air and exhale carbon dioxide.

In fact, if people can protect more vegetation and plant more trees in their daily life, it will actually help the earth's environment a lot. Because a lot of carbon dioxide is exhaled in people's breathing. In fact, in the process of combustion, in the process of promoting human progress in these fuels, a large amount of carbon dioxide will also be produced, and if there is no evolutionary role of plants, then it is obvious that the carbon dioxide will exceed the standard, resulting in the production of greenhouse gases.

Therefore, it is necessary to plant more trees and protect vegetation in daily life, so that people's air can be fresher. Moreover, it can effectively reduce greenhouse gas emissions, so as to avoid global temperature rise.

This is because when oxygen in the air enters the body, it is exchanged with carbon dioxide in the blood, and carbon dioxide is excreted from the body with exhalation.

It is because the human body can also filter impurities, so the air that people exhale is carbon dioxide.

Because the lungs inhale relatively clean air, which will expel carbon dioxide from the body, the nasal cavity can inhale particulate matter and fiber.

There are many complex organs inside the human body, and they all have their own roles, such as our tongue can help us taste the taste of food, and some livers secrete hormones, and the body actually has some chemical reactions happening every day, our high school chemistry book The law of conservation of elements, just converts all elements into other substances, but the total number of elements does not change, and the last bit of oxygen we inhale is due to certain chemical elements in the body and environment, such as carbon dioxide produced by chemical reactions.

In fact the human body is very complex, much like an ecosystem, our organs can be seen as part of the ecosystem, such as trees and rivers and so on, each with its own characteristics, and at the same time cooperate with each other to ensure the integrity of the whole system, and the oxygen of the organs is to provide a lot of active energy, you can see a catalyst, but after a series of transformations finally become carbon dioxide.

Again and again with nature, because the factories need to absorb carbon dioxide, grow, and provide them with carbon oxygen finally returned to the earth, we are in the absorption of oxygen, so forming a good ecosystem cycle to ensure our safety and stable development, or maybe human beings can not survive on earth, we think that the first difficulty in the universe is that there is no oxygen, so most of the time you want to go to space exploration need special equipment.

Because respiration requires oxygen to interact with glucose in the body to release the energy needed by the body to maintain body temperature and normal human activities, and this process releases carbon dioxide that the human body does not need, so it is exhaled....Hehe, I'm reviewing biology,

Hello, what people inhale is oxygen and exhale carbon dioxide, which is the breathing process of the human body. We breathe air, and there is oxygen in the air. When oxygen enters the lungs, the alveoli in the lungs transport oxygen to the red blood cells.

Red blood cells, in turn, return carbon dioxide from the blood to the alveoli. So people breathe in oxygen and exhale carbon dioxide.

Because hemoglobin has the function of transporting oxygen, when a person inhales oxygen, hemoglobin carries oxygen to all cells in the body, and then the cells hand over waste products, including carbon dioxide, to hemoglobin, which is exchanged for gas when it reaches the lungs, and so on.

Human respiration is because respiration produces energy to maintain human life activities, and respiration is essentially the oxidative decomposition of organic matter, so oxygen is required, and the reaction product is carbon dioxide.

Because people need to consume oxygen to convert nutrients into energy, and carbon dioxide is produced in this. In fact, only a small amount of carbon dioxide is exhaled.

Because mitochondria need oxygen for aerobic respiration, the reaction produces carbon dioxide.

No one inhales carbon dioxide and exhales oxygen. Normal people and higher animals breathe in oxygen and exhale carbon dioxide(More precisely, the exhaled breath has a significantly higher carbon dioxide content than the inhaled gas, and the oxygen content decreases significantly, when in fact the exhaled gas still accounts for a higher percentage of oxygen than carbon dioxide.) ）

Only photoautotrophs, such as common plants, inhale carbon dioxide and release oxygen. None of the others. But this gas exchange process is not a breathing process!

All animals in the world, including people, inhale oxygen O2 and exhale carbon dioxide CO2, which is a false proposition, only plants absorb carbon dioxide gas during the day, and what is released is oxygen, generally green plants are more obvious, called photosynthesis, there are people in primary school textbooks who are impossible to complete, which is related to the internal structure of the body, and it is impossible to complete without such a structure