What are the physiological limits of human beings? The limits of human physiology are revealed

The physiological limits of the human body.

One. Cardiac arrest limit: about 4 hours.

According to the Shanghai Family Daily, medical theory believes that under normal circumstances, the human body can stop beating for 4 minutes.

It can die due to the lack of blood and oxygen in the brain.

Two. Heart limit: 220 beats in 1 minute.

The heartbeat limit refers to the limit of the heart's movement, which refers to the maximum limit that the heart can work as scientifically discovered so far.

The number of heartbeats, which is the formula for calculating the maximum heart rate of the human body. Beyond this value, the heart cannot continue to function normally.

Pulsation function.

Even when participating in physical activity, it is impossible to exceed this limit when it comes to detecting and evaluating the effects of exercise. Limit.

Exercise is the same as facing an emergency, if the person is constantly in a state of emergency combat, as soon as the process is over, the body will.

You will feel very weak. In the long run, life will be overdrawn.

Three. Odor resolution limit: about 3000 species.

The average person can distinguish more than a dozen different smells, and carry out repeated olfactory training, and people's odor discrimination ability.

It can be improved.

By the time they graduated, trained perfumers were able to distinguish and memorize more than 400 scents, and counting.

In practice, this ability will be further enhanced, and at least 2,000 scents can be familiarized, which is about the exception.

3000 scents can be memorized.

Four. Minimum body temperature limit: approximately.

The lower limit of axillary temperature in normal people is usually lower than 36 in some people, but it is extremely rare.

The minimum body temperature limit for the human body is approximately the result of testing.

Five. Maximum body temperature limit: approximately.

The upper limit of axillary temperature in a normal person is usually: If you have a fever, the maximum is 42. But people.

The maximum body temperature limit is approximately.

Six. Ambient temperature limit: approx. 116

The ambient temperature limit is the temperature at which the human body can still breathe while in the middle of it. Experiments have found that due to the inability to.

Through perspiration and evaporation, the ability of a person to withstand high temperatures in water is significantly lower than that in dry air.

Scientists have experimented with the highest temperature that the human body can tolerate in a dry air environment: the human body is 7

1 Environment, can last a full 1 hour; At 82 hours, it can last 49 minutes; At 93 hours, it can last 33 minutes;

At 104, it only lasts 26 minutes. However, according to the relevant literature, the limit temperature that the human body can tolerate.

It seems to be a little higher.

Seven. Renal residual limit: about 30%.

Renal insufficiency occurs when the residual nephrons are further reduced by less than 30%. When less than 10% 15%.

, symptoms of uremia will appear.

Scientific experiments have confirmed that by exercising and tapping into the potential of the human body, human beings can overcome many hereditary weaknesses and challenge physiological limits.

1. Cardiac arrest limit: approximately 4 hours.

Solution: In 1987, a Norwegian fisherman fell into icy water in the waters near Bergen. By the time he was admitted to the hospital, his heart had stopped. But when he was connected to an artificial heart-lung machine, his heart miraculously began beating again.

2. Heart rate limit: 220 beats in 1 minute.

Solution: This refers to the limit of the heart's movement, and it is also the maximum number of beats that the heart can work at so far. Above this value, the heart cannot continue to perform its normal blood beat.

III. Ambient temperature limit: about 116

Solution: This is the temperature at which the human body can still breathe while in the midst of it. Scientists have experimented with the highest temperatures that the human body can tolerate in a dry air environment

The human body can last a full 1 hour in the 71 environment; At 83 hours, it can last a full 45 minutes; At 93 hours, it can last 33 minutes; At 104, it only lasts 26 minutes.

IV. Minimum body temperature limit: about 14 2

Solution: In 1994, a 2-year-old Canadian girl named Kari Kosolovsky was locked out of the door for six hours, and it was said that the outdoor temperature was 22 at the time. In the end, the little girl was lucky to save her life, except for one left leg that had to be amputated due to frostbite.

V Maximum body temperature limit: about 46 5

Solution: There is an example: In 1980, the temperature in Atlanta, Georgia, USA was 32 2, and 52-year-old Willie Jones was admitted to Grady Memorial Hospital in Atlanta due to heat stroke, and his body temperature reached a record high of 46 5 at that time, and it took 24 days before the fever completely subsided.

6. Renal Residual Limit: Approximately 30

Solution: The functional unit of the kidney is nephron, and there are about 2 million nephrons in both kidneys, so that the kidney has a large compensatory function. When various a**gens cause loss of nephrons up to 60 70 1'(Left and right, the remaining healthy nephrons can still meet the physiological needs of the body.)

People will keep getting hurt, and then they will heal, grow up from wounds again and again, and then find that what they thought was the limit is not the limit.

There is no limit.

Always believe that sadness will pass, and believe that tomorrow you can smile happily.

As long as you work hard, as long as you don't give up.

Happy New Year's Day.

It is to be close to the brink of physical or mental collapse.

A rubber band can be stretched, but there is always a time to break, just the length that is about to break, which is its length limit.

A sports student, he is constantly running, but there is always a moment when he can't hold on, when he is about to hold on, but has not yet fallen, it is the limit of his physical strength.

A person who endures the trials of remorse, pain, fear, etc., he can endure, but there will always be times when he breaks down and goes crazy, when he is not insane but not far from neuropathy, which is the psychological limit of his will.

In most cases, the oxygen pressure in the air at high altitudes is significantly reduced, and human cells need oxygen to survive. At high altitudes, the body's haemoglobin (a blood protein that transports oxygen from the lungs to cells) rises, resulting in an inability to absorb oxygen at full volume, resulting in a state of hypoxia throughout the body.

The human brain is very sensitive to oxygen levels, which is why the first reaction to altitude sickness is headache and dizziness. If you live at an altitude of 5,000 meters for a long time, your muscles will shrink, your lungs will accumulate deadly fluid, and your brain will become larger. If you live at an altitude of 7,500 meters for a long time, there will be a significant lack of oxygen in the human body, and it is easy to lead to coma and eventually death.

At what altitude can the human body survive at the maximum altitude? Nearly half of Bolivia's population lives in the highlands, where the altitude reaches more than 4,000 meters, but they do not suffer from too many physical pathologies. Many Chilean miners work for weeks at an altitude of 5,800 meters.

Mike Glocott, University of Southampton, UK

Grocott said that men living at higher altitudes can temporarily suppress male fertility.

But if it takes some time for people to adapt, they can adapt to live at high altitudes, and generally speaking, humans are still adapted to living at low altitudes, and if you don't adapt to the high altitude environment and suddenly reach Mount Mudhammar at an altitude of 8,848 meters, you can die in as little as 2 minutes.

Only a few people are able to adapt to the hypoxic environment at high altitudes, 1999, Babu

Chirisherpa broke a world record when he survived for 21 hours in the hypoxic environment of Mount Everest. Glocott said it was likely to be babu

Chirisherpa has the ability to survive at high altitudes physiologically. He emphasized, "I guess the highest altitude that the human body can withstand is 9,000 meters.