Why it is difficult to breathe at high altitudes

Because the air pressure affects the amount of oxygen dissolved into the blood, that is, the partial pressure of oxygen PO2, the lower the air pressure, the lower the dissolved amount, and the ventilation volume needs to be increased to be sufficient. People who live at high altitudes all year round should not have an unpleasant reaction.

Yes, at high altitudes, there is less oxygen, and taking a breath is less oxygen than usual, so it is relatively difficult to breathe.

It is because the air pressure is small, the inhalation process is based on the expansion of the chest cavity, the air pressure in the lungs is reduced, the external air pressure is greater than the inside, the air is pressed in, and the air pressure on the plateau is small, so the chest cavity must be expanded large enough, and the air pressure in the lungs is less than that outside the lungs, so it is very laborious, so it is difficult to breathe.

Low oxygen levels also play a role.

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What is it??

This condition is colloquially known as altitude sickness. Because at low altitudes, people have become accustomed to maintaining a normal life by breathing a lot. At high altitudes, the air is thin.

People at lower altitudes, who breathe in a habitual way, will not be able to adapt to this situation. Causes difficulty breathing.

Because the oxygen content in the air at high altitudes is relatively small, carbon dioxide increases, resulting in inhaled oxygen and exhaled carbon dioxide cannot be proportional, so it will be difficult to breathe, resulting in altitude sickness.

That is, altitude sickness will occur, and secondly, it is also because we do not adapt to such an environment, which leads to hypoxia, so it will be difficult to accept.

The atmospheric pressure in the mountains will be lower than in the water level, that is, the oxygen content of the air per cubic unit is low, and there are fewer oxygen molecules, and people breathe"Dynamics"If you say the same, you will be less oxygen-inhaled, so you will feel it"Dizziness"Or need"Afterburner"Breathe in order to inhale enough oxygen molecules.

When people are away from sea level or at very high altitudes.

Dyspnea or shortness of breath; The reason for this is the weak air in the high places.

Resulting in a decrease in oxygen. When people move on level.

Its body produces a lot of carbon dioxide and uses a lot of oxygen; In the respiratory center of the brain, there is less oxygen and more carbon dioxide in the blood. and accelerates the frequency of respiration.

Pseudofissures cause lung disease.

The function of the heart and lungs is not normal.

It often leads to accelerated breathing and more severe disease. yip

Reference: Translated from an English medical book.

It's called altitude sickness, and it's caused by hypoxia.

Generally speaking, the area with an altitude of 3,000 meters or more above is called a plateau. Because most people go up the mountain to this height, they will have obvious signs and symptoms. Beyond this altitude, biochemical, physiological, and anatomical inadequacies become more and more apparent, in fact, at lower altitudes, these changes have already begun to appear, but only when they reach 3000m.

Plateau areas are characterized by low air pressure, and the partial pressure of oxygen is correspondingly reduced, resulting in hypoxia in the human body. Some people have studied that the oxygen content in the air is still maintained at an altitude of 1 million meters, indicating that the oxygen concentration in the air on the plateau is the same as that in the plain. But the gas is compressible, that is, the number of molecules of the gas per unit volume, but the plain is higher than the plateau.

In other words, the atmospheric pressure, determined by the density of air molecules, decreases with increasing altitude, which is why the partial pressure of oxygen in the air on the plateau decreases. The data show that at sea level, the atmospheric pressure is, when the partial pressure of oxygen is 1500m above sea level, the atmospheric pressure drops to 84kpa, and the partial pressure of oxygen also drops, and at an altitude of 5500m, the atmospheric pressure drops to, only 1 2 of the atmospheric pressure at sea level, and the partial pressure of oxygen also decreases to 1 2 at sea level, ie.

This series of figures tells us that in the highland area, low air pressure and scarce oxygen are the causes of breathing difficulties. For entering the plateau area in a short period of time, some people will experience dizziness, headache, rapid heartbeat and breathing within a few hours, and severe cases will have symptoms such as loss of appetite, nausea, vomiting, insomnia, fatigue and cyanosis of the lips, which is called altitude sickness. In severe cases, high-altitude pulmonary edema and high-altitude cerebral edema may occur, which can endanger the patient's life.

The third paragraph of the statement of utility bills is illegal in third places.

The air is thin, the air is thin, the air is thin.

Altitude sickness is a variety of pathological reactions produced by the human body after rapid exposure to low-pressure and low-oxygen environment, and is a common disease unique to plateau areas. Common symptoms include headache, insomnia, loss of appetite, tiredness, difficulty breathing, etc. Headache is the most common symptom and is often a throbbing pain in the forehead and both temporal regions, which worsens at night or in the morning when you wake up.

Increased ventilation of the lungs, such as breathing through the mouth and light activity, may reduce headaches.

The incidence of altitude sickness is related to the speed of climbing, altitude, length of residence, and physical fitness. Generally speaking, when plain people quickly enter the plateau above 3000m above sea level, 50% and 75% of people have altitude sickness, but the symptoms gradually disappear after 3 to 10 days of habit. The incidence of this disease is lower in the elderly than in young people, and in women than in men; The incidence of altitude sickness was positively correlated with the body mass index of men and not with the body mass index of women, indicating that obese men were more susceptible.

Hello, because the air pressure affects the amount of oxygen dissolved into the blood, that is, the partial pressure of oxygen PO2, the lower the air pressure, the lower the dissolved amount, and the ventilation volume needs to be increased to be sufficient, in addition, the air at high altitudes is thin, and more air needs to be inhaled to meet oxygen consumption, which causes breathing difficulties when adapting to people from low altitudes to high altitudes. People who live at high altitudes all year round should not have an unpleasant reaction. So aerobic respiration is performed.