Our body is reactive to a lot of things such as behavior, situations, temperature, gravitational, and scientific forces. Cold, heat, pressure, and other forces is why the body reacts, which can react differently to different people in various situations. There are some who can handle extreme cold wintry temperatures, while others can tolerate extreme heat, which can be fatal for others.
When there’s extreme G force vertically on the human body, things can go haywire, this especially if the force level is around 4g to 5g. It then becomes difficult for the body to pump blood, as the blood accumulates in one place. When there’s negative G force, the blood flow gets clogged, and the reason pilots might end up losing their consciousness.
Once the human body feels considerable drop in the surrounding pressure, what results is decompression sickness, known as “the bends.” The blood can’t dissolve gases like nitrogen as they remain as bubbles in the bloodstream. After a prolonged period of time, these bubbles accumulate in blood vessels and blocks the blood flow, which can result in dizziness or even death. Those who commonly suffers from decompression sickness are divers.
Once the body’s temperature drops to 30 degree Celsius or 86 degree Fahrenheit, the bodily functions begins to slow down, such as the heart and lungs. Fatigue increases and the renal system fails. The entire body begins to starve for oxygen, resulting in shock and heart problems.
Once the body’s temperature goes beyond 40 degree Celsius, heatstroke can occur. Severe cases of heatstroke can lead to brain damage. Humid weather can contribute to the heatstroke since it decreases the body’s ability to get rid of the heat. Once the body temperature reaches 42 degrees Celsius, the cells will begin to slowly start breaking down, the tissues will swell, the digestive linings weakens, and the circulatory and nervous systems slows down, which can cause convulsions and dizziness.
What fire does is immediately burns the first layer of the skin. The average human body can burn for 7 hours, until the inner dermal skin turns to ash. The fire begins to melt body fat, forcing it to become a wick, and can burn for hours. The muscles dry out and starts contracting because to the heat and flames. The fire automatically burns out while just the bones remain.