Why is the temperature of 37 degrees Celsius warmer than water?

In summer, when the temperature is 37 degrees Celsius, we will feel very hot, but when taking a bath, the same 37 degrees Celsius will make people feel cold. So, why is the temperature of 37 degrees Celsius warmer than water? What is the body temperature? Let me introduce you.

Why is the temperature of 37 degrees Celsius warmer than water?

Why do people feel hot at 37℃, but feel cold when taking a bath?

The temperature is different from the somatosensory temperature. Somatosensory temperature is a direct factor that makes the human body feel hot and cold. The temperature is 37℃, and the actual somatosensory temperature may exceed 37℃; The bath water temperature is 37℃, and the actual somatosensory temperature may be lower than 37℃.

In addition to temperature, there are other factors that affect the body's somatosensory temperature, such as humidity, wind, sunshine, clothes, mood, physique and so on. At present, dressing index, air conditioning index and sun protection index are added to the weather forecast as effective supplements, which are obtained by integrating other factors that may affect the body temperature.

The thermal conductivity of water is more than 20 times that of air. Therefore, under the same condition of 37℃, the air environment will inhibit the heat dissipation function of human body, leading to the increase of somatosensory temperature and unbearable high fever. When the human body is in the water environment, water can quickly conduct the temperature of the human body surface, and the heat generated by the human body will not accumulate on the skin surface for a long time like in the air, but will quickly disperse into the water. In this way, people won't feel hot.

What is the body temperature?

As an advanced mammal, human beings belong to warm-blooded animals, also known as warm-blooded animals. That is to say, the temperature in the human body will not change due to the influence of external temperature, and its internal temperature remains relatively stable all the time, that is, the core temperature of the human body is 37℃. It should be noted that 37℃ is not the surface temperature of human body, but the internal temperature of human body, and the surface temperature of human body is actually only about 33.5℃. After knowing the body temperature, let's take a look at the human body's heat dissipation system. The heat dissipation of the human body mainly evaporates the sweat on the body surface through perspiration. This process will take away most of the body's heat, thus helping people to achieve the effect of cooling. Another common way is that the human body spreads the high-temperature blood in the body to the limbs for heat dissipation through blood circulation, and it can also exchange the warm air in the body by inhaling fresh air.

Why do we have a fever?

For example, everyone knows that machines work. When the machine is electrified and the switch is turned on, electric energy can be converted into kinetic energy, and the engine will generate heat in the process of energy conversion.

Like the working principle of machines, the human body also converts one kind of energy into another, but people get energy by eating. The body converts food into energy to support our body movements, including physiological movements (such as heart beating and blood transmission) and body movements under human movements (such as walking and running), so it is understandable that people will be hungry if they don't eat.

Similarly, various movements of the human body will also generate heat, which needs to be dissipated, otherwise the body will stop normal operation because of overheating, just like any overheated engine.

Does the human body radiate heat all the time? You don't need to dissipate heat in winter, you need to absorb heat! )

It will be cold in winter, so we usually wear more clothes to prevent the body from radiating outward and maintain normal body temperature.

This can also explain why a person will be cold indoors and many people will be warm indoors. Because one person radiates less heat, everyone will radiate more heat in the room, and the temperature in the room will rise. In winter, we are all a small moving sun.