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- $Unique_ID{BRK00971}
- $Pretitle{}
- $Title{How Can The Top of Your Head Lose so Much Heat?}
- $Subject{scalp heat loss head Metabolism Circulatory blood vessels blood
- circulation}
- $Volume{G-20}
- $Log{}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
-
-
- How Can The Top of Your Head Lose so Much Heat?
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-
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-
- QUESTION: You wrote in a recent column that "you may lose up to one half of
- your body heat through the top of your head". I know that statement is true
- for I have seen it many times in health columns, but I have never seen an
- explanation. People wonder how such a small part of your body can lose so
- much heat. Please do millions of people a favor and explain how. Or don't
- you know?
-
- ------------------------------------------------------------------------------
-
- ANSWER: That's the way! Issue a challenge, and you know I'll put your letter
- in the column. Especially when I DO know the answer. First we must
- understand that the heat of our body, which is produced by the metabolism or
- burning of the nutrients we eat, carbohydrates, proteins and fats, is
- distributed throughout the body by the circulatory system. The heat contained
- in the blood warms all the tissues and keeps the body temperature at an normal
- 98.8 degrees Fahrenheit. One look at a diagram of the arteries and
- capillaries of the scalp would provide you with the answer that millions of
- people will now know. The skin of the scalp, which is thicker than in any
- other part of the body, is loaded with a rich network of blood vessels. Most
- people who have suffered a cut or laceration to the scalp, know just how much
- blood seemed to flow, and how difficult it was to stop the bleeding. This
- extensive blood circulation close to the surface of the skin can lose a great
- deal of heat in cold weather, particularly when the wind chill factor dips to
- low numbers. A hat or cap acts like a blanket, retaining the body heat and
- preventing its loss to the cold environment. The same anatomy can act to help
- you cool off during the heat of summer, when dousing your head with cool water
- leads to the process of evaporation, and helps your body disperse unwanted and
- unneeded heat. Your perspiration over the rest of your skin acts in the same
- way, but the concentration of blood vessels on the top of your head makes your
- scalp an efficient heat pump.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-
-