 We perspire to maintain to keep
the temperature of our internal thermostat set to an
average, normal temperature of 98.6 degrees Fahrenheit. Our
bodies come fully equipped with a temperature center in the
brain, which consists of a control center, a heating center,
and a cooling center.
Our bodies use approximately 2,500 calories of our daily
intake of calorie-laden food to fuel the body. This process,
known as oxidation, burns the calories, producing
enough heat to bring 25 quarts of water to the boiling
point. Obviously, our bodies cannot tolerate this heat, which
causes the temperature of the blood to rise dramatically, and
the cooling center to springs into action.
The cooling center slows the calorie burning process, and
dilates, or opens, the blood vessels in the skin to
release the excess heat, and the fluid known as
perspiration.The release of this fluid cleanses the
body, as it pours through our pores, which consist of
millions of tiny openings in the skin. Perspiration emerges on
the surface of the skin in the form of tiny,
microscopic droplets, which quickly evaporate, and cool
the body to its normal temperature.
Evaporation of perspiration on humid days slows, and
requires the assistance of manmade inventions, such as fans
and air conditioners, to carry away the moist air, so our
perspiration evaporates, and so our internal thermostat
returns to it's normal setting of 98.6 degrees Fahrenheit.
Apparently, our cooling center is not self-sufficient! |
perspire: 流汗
thermostat: 自動調(diào)溫裝置
oxidation: 氧化
quarts: 夸脫
dilates:
膨脹，擴(kuò)大
perspiration:
排汗
pore: 毛孔
microscopic:
用顯微鏡可見的 |
