The earth is a world of life rich in species, with millions of kinds of creatures, among which the types and numbers of animals occupy the mainstream. In essence, human beings are also animals, a member of mammals, but human beings are intelligent life. With continuous development and progress, human beings are reclassified into one family, which we call the human family, which is completely the same as that of animals. separate.
Each animal has its own body temperature, and in the earth biological world, according to the attributes of body temperature, it is divided into cold-blooded animals and warm-blooded animals. Cold-blooded animals are also called temperature-changing animals, and their temperature changes with the outside temperature. Temperature-changing animals dominate the earth’s biological world, and most animals belong to this category.
The body temperature of stellar animals will not change due to changes in the outside temperature. This is because such organisms have a mechanism for self-regulating body temperature. Birds and mammals are basically stellar animals. Human beings are also mammals, and naturally they are also stellar creatures. There are corresponding mechanisms in our bodies to regulate the stability of body temperature.
When the body temperature drops, the hypothalamus’s thermoregulatory center will make the muscles tremble to generate more heat; at the same time, it will make the blood vessels constrict to reduce heat dissipation. Also when the body temperature rises, the brain will also take measures to cool down.
Different organisms have different temperatures, and the gap is relatively large. Through research, it is found that elephants have the lowest body temperature of 35.5°C, while birds have the highest body temperature of 42.8°C, while humans have moderate body temperatures. What is the human body temperature?
I believe that many friends know that the normal human body temperature is 37 ℃, and this body temperature was in 1851. The German medical professor Karl Wendrich measured the armpit temperature of 25,000 people and obtained millions of data. A data obtained. This data was later widely used and has been used until now.
Of course, a person’s normal body temperature will not always maintain 37 ℃, and there will be regular fluctuations at different times of the day. Generally speaking, a person’s normal body temperature reaches the highest in the afternoon to the evening, and the lowest when they first wake up in the morning. And the body temperature of male wives is usually 0.3 degrees Celsius lower than that of females, which is believed to be felt by the majority of friends.
In the past two years, the continuation of the new crown epidemic has brought people all over the world into the ranks of fighting the epidemic. In order to prevent and detect the virus in time, we need to take temperature measurements when we enter some public places. Through the temperature measurement of the instrument, I believe that many friends will find that their normal body temperature is not 37 ℃ at all, but about 0.3 ℃ lower than this number. What is going on? Is it true that the normal human body temperature data that has been used for more than 100 years is wrong?
Of course not. The 37 ℃ normal body temperature data obtained by scientists through data collection more than 100 years ago is undoubtedly correct. If this data is wrong, it is impossible to continue to use it for more than 100 years. If so, why is the human body temperature data lower than 37 ℃?
Through the comparison of data before and after more than 100 years, scientists have discovered a fact that they have to believe: human body temperature is dropping, and the normal body temperature is already lower than the standard established in the 19th century. Previously, scientists re-measured the oral temperature of 35,000 people, and obtained an average value of 36.6 ℃ through collected data, indicating that human body temperature is falling.
In 2020, scientists at Stanford University confirmed this conclusion through more detailed research, and also came to a new conclusion: human body temperature will drop by 0.03 ℃ every 10 years. Compared with the data obtained by Professor Wendlich in 1851, the normal human body temperature has dropped by 0.4 ℃ to the current 36.6 ℃. Among them, the body temperature of men dropped more than that of women, reaching 0.59 ℃. No wonder there are more and more “cold men” now. The original source is here.
Current scientific research shows that the normal human body temperature is indeed declining, and this downward trend seems to continue. So the question arises: Why does the human body temperature drop? What impact will this change have on mankind? Is it good or bad?
As for the reason for the continuous decline of human body temperature in the past 100 years, scientists believe through research that it may be related to the rapid development of human civilization. We all know that the human body has a strong immune system that can kill invading viruses and bacteria in the body.
When the immune system wants to eliminate viruses and bacteria, the cytokines produced will increase the body’s metabolic rate, thereby releasing more heat and raising body temperature, so as to better eliminate the bacteria. Therefore, in our daily life, we will find that when we catch a cold, we are often accompanied by a high fever. This is actually the result of the body’s immune system fighting against germs.
More than 100 years ago, human technology was far less advanced than it is now, especially when it comes to medicine, which is still in its infancy. At that time, the probability that the human body was thanked by bacteria and viruses was much higher than it is now. Take tuberculosis as an example. In the 19th century, about 2% to 3% of people were infected with tuberculosis. The current rate is very low.
With the rapid development of science and technology in the past 100 years, medicine has made tremendous progress. The injection of various vaccine antibodies allows us to be immune to many bacteria and viruses, thereby greatly reducing the probability of people being infected by bacteria and viruses. .
Without the invasion and destruction of a large number of bacteria and viruses, the number of times the immune system fights is greatly reduced, so that no more heat will be released, and the human body temperature will continue to decrease. In addition, the quality of life of modern humans has also been greatly improved. We live in better houses, with air-conditioning and other cooling methods, which can keep the living space at a good temperature. In this way, our body does not need to release more heat to maintain body temperature.
So what effect does low temperature have on humans? Is it good or bad? Scientists have not yet given a definitive answer to this. Since the time span of body temperature decrease is still relatively short, it has not yet seen any impact. Some people think that if body temperature is lowered, the body’s metabolism will also be lowered, which can increase the life span of human beings.
It is also believed that lower body temperature may lead to a decrease in human resistance to new bacteria and viruses, making it more susceptible to infection with unknown bacteria and viruses. Of course, whether it is an increase in lifespan or a weakening of the ability to resist viruses, it is still some speculation. Scientists believe that the average human body temperature may further decrease in the future. Whether this decreasing trend is good or bad for humans requires further scientists. Research.