People inhale air, exhale carbon dioxide and where does nitrogen go

People inhale air and spit out carbon dioxide" is just a dirt saying.

In fact, the air inhaled by the human body is nitrogen (78%), oxygen (21%), noble gases [helium, neon, argon, krypton, xenon] (carbon dioxide (other [including water vapor]) (; The breaths exhaled by the human body are nitrogen (75%), oxygen (16%), noble gases (carbon dioxide (4%), water vapor (.

Nitrogen is the largest percentage of volume and is generally not considered because it is neither useful nor harmless to the human body. The absolute value of nitrogen does not change during respiration, and the percentage difference is due to the relative change due to the influence of the percentages of the other two gases.

Faint, you're strong enough, think about it, it's also 78% nitrogen, and it's impossible to go away, but if nitrogen is in the body, then the blood vessels will dilate, which is very dangerous, but people are fine, so nitrogen is excreted by human respiration.

Nitrogen is absorbed by the body's respiratory organs, but only most of it is eliminated with carbon dioxide, and the absorbed part plays a key role in the body's immune system. Inhibits the production of germs.

It came out with carbon dioxide.

In this process, nitrogen does not participate in metabolism!

Sucked it in and spit it out.

and other ingredients in the air.

Nitrogen does not participate in the reaction.

This question. Nitrogen is hungry.

We all know that oxygen is inhaled and carbon dioxide is exhaled. So, why do people inhale oxygen and turn it into carbon dioxide when they exhale? Let me tell you!

Why do people inhale oxygen and exhale it into carbon dioxide?

There is an organ in the human body that is responsible for gas exchange, and it is the lungs. When oxygen is inhaled through the nostrils, it enters the trachea. The trachea goes straight down and then divides into two bronchial tubes, the left and right ones, which are buried in the left and right lungs.

The bronchial tubes are constantly subdivided, producing countless tiny branches, each of which ends with several alveoli attached. The lungs are made up of overlapping bronchioles and alveoli. The surface of the alveoli is filled with capillaries.

This is where the fresh oxygen inhaled diffuses into the capillaries and travels in all directions of the body as the blood flows. At the same time, the carbon dioxide exhaust gas produced in the human body also comes to the capillaries here, enters the alveoli through gas exchange, and then collects from the bronchi to the trachea, and finally excretes with exhalation. It is through this series of processes that the fresh oxygen inhaled becomes carbon dioxide exhaust gas.

Why carbon dioxide can't be burned and doesn't support combustion

The properties and structure of the molecule itself are determined. No, mg (magnesium) can be burned in carbon dioxide to produce magnesium oxide and carbon element.

Carbon dioxide does not burn and does not support combustion, why does it react with carbon to form one.

c + CO2 = 2co carbon and carbon dioxide reaction under high temperature conditions is endothermy, the reaction temperature should be above 1000 degrees, c is excessive, anoxic environment and carbon dioxide has two oxygen atoms, naturally to borrow one. This reaction occurs when steelmaking is made. Please, carbon is an organic matter CO2 can support combustion under certain conditions, hexun1 such as magnesium and CO2 can be burned to produce C and magnesium oxide, as for the reaction with C may involve structural problems My electromechanical, majored in chemistry in college.

The reaction between carbon dioxide and carbon is not a combustion reaction, the combustion reaction will be violently exothermic, and this reaction is an endothermic reaction, which belongs to the redox reaction.

Why carbon dioxide can't be burned.

Carbon dioxide does not burn, but it can support combustion, and oxygen is a property. For most substances, they can be burned violently in oxygen and extinguished when they are put into carbon dioxide, but some substances are more special, and they can not only be burned in oxygen, but also in carbon dioxide, such as magnesium, sodium peroxide, etc., so when sodium and magnesium are on fire in the laboratory, carbon dioxide can not be used to extinguish fires, but sand is used. It's because carbon dioxide can fuel and amplify the fire, because it's not something that can burn.

Why does carbon dioxide not support combustion and does not support combustion?

This is one of the chemical properties of CO2. Non-combustible means that it is not flammable, and non-combustible because it cannot support combustion. There's no way to oxidize First of all:

Carbon dioxide due to fire extinguishing is due to the fact that carbon dioxide is non-flammable and does not support combustion. And the density is greater than that of air. This statement is true.

So why magnesium can be burned in carbon dioxide.

In three phases:

1. In the first stage, various energy substances are converted into acetyl-CoA through different catabolic pathways.

2. In the second stage, the dicarbon acetyl group of acetyl-CoA (acetyl-CoA) is converted into CO2 and hydrogen atoms through the tricarboxylic acid cycle.

3. In the third stage, hydrogen atoms enter the electron transport chain (respiratory chain) and finally transfer to oxygen, with which water is formed; At the same time, ATP molecules are produced through oxidative phosphorylation that accompanies the electron transport process.

Carbon dioxide production: Organisms mainly produce CO2 through decarboxylation, that is, metabolites are first converted into carboxylic acids containing carboxyl groups (-Cooh), and then CO2 is removed from the carboxyl groups under the catalysis of specific decarboxylases. Oxidation reactions in cells can be carried out in a variety of ways, such as "dehydrogenation", "oxygenation", or "electron loss", with dehydrogenation being the most common and important.

Among the exhaled breath, nitrogen is the most abundant, accounting for nearly 78%. And oxygen is not fully absorbed and utilized by our body with every breath. Relevant studies have shown that only 4% 5% of the oxygen in the inhaled air is converted into carbon dioxide by the body, and the rest will be excreted through exhalation, that is to say, oxygen will account for about 16% of the exhaled air, and carbon dioxide mainly comes from the body's metabolism, so it accounts for about 4%.

The content of water vapor accounts for the total, which also reflects the humidification of the gas by the respiratory system. Similarly, in the exhaled air, some other gases and impurities also account for approximately. The most obvious change in the exhaled air compared to the inhaled air is the decrease in oxygen and the increase in carbon dioxide, so we summarize the characteristics of breathing as inhaling oxygen and exhaling carbon dioxide.

But we need to understand this knowledge in a holistic and objective way, so that it is not easy to fall into misunderstandings.