This little goat is in a pen. noun. The definition of a pen is a small yard or animal enclosure, or an tool used to draw or write with ink. An example of a pen is a petting zoo. An example of a pen is a ball point.
If you are referring to the internal temperature of the human body, studies show most bodies can only survive up to 108 degrees Fahrenheit, or 42 degrees Celcius, as the proteins inside the body begin to die at around 105F.
Humans are homeotherms like most mammals. This means that we are warm blooded animals and have to regulate our internal body temperature. The ideal temperature range for a human body is 37Â°C. If there is even a 5Â°C drop or rise in body temperature, it could spell doom for the human being. As you can see, the temperature range within which a human can survive is very narrow. This makes one wonder what regulates body temperature in humans.