Scientific topics from sermons- Lesson (125): How Organism Withstands cold
Praise be to Allah, the Lord of Creations, and Peace and blessings be upon our prophet Muhammad, the faithful and the honest.
 Oh, Allah, we know nothing but what You teach us. You are the All- Knower, the Wise. Oh Allah, teach us what is good for us, and benefit us from what You taught us, and increase our knowledge. Show us the righteous things as righteous and help us to do them, and show us the bad things as bad and help us to keep away from them.
  O Allah our Lord, lead us out from the depths of darkness and illusion, unto the lights of erudition and knowledge, and from the muddy shallows of lusts unto the heavens of Your Vicinity.

How could the temperature of human body be raised?
 What does human organism - the organism that Allah has created in the very best stature - do when man is cold? With what has man been equipped in case he is befallen by cold? How does man defend himself against cold? What kinds of organs and systems has Allah granted man’s organism in order to withstand cold?
 Scientists say: Man’s skin is considered, as it were the “Ministry of the Exterior” for the human body. It transmits to the body all temperature changes that take place in outer environment. In the skin there is a special center for transmitting information about fall or rise of temperature. If the weather gets cold, and if there is nothing to remove cold, what does man’s organism do? It narrows the interior walls of veins and arteries, particularly exterior ones. This causes lesser blood to flow along them, which minimizes heat radiation, and the body preserves its stored heat through burning of food substances.
  The complexion of a person who is suffering from excessive cold turns pale, which means that the surrounding exterior blood vessels have been narrowed and the quantity of blood flowing through them has been minimized, and, consequently, the heat that the body loses through radiation of the heat stored in the blood has also been minimized.
  Something else also happens: The hypophysis sends a special hormone to the thyroid gland, which, in turn, does a very complicated process, namely the change of food into energy. The hypophysis sends a hormone-order to the thyroid gland to increase the process of burning food substances, which causes more heat to flow through the body. The rate of hormones in the blood rises , specially those produced by the hypophysis, which orders the thyroid gland to increase the level of burning food substances in the body.
 Man also withstands cold by means of another mechanism. In man’s head there are more than 250,000 hairs, each of which has a vein, an artery, a nerve, a muscle, a fat gland, and a dye gland. If a person gets cold, orders are sent to the hairs of the head to stand upwards, keeping as much hot air as possible.
 All the above-mentioned sophisticated processes take place in man’s human body, while he is completely heedless and unconscious: his Veins and arteries get narrowed, his hypophysis works to withstand cold, the thyroid gland increases the process of changing food into heat energy, the rate of sugar in the blood increases, the body shivers, the hairs of the head stand up: all this takes place while man is heedless and unconscious. Blessed is Allah, the Best Creator!



Translation  : Khaled Al- Athmeh
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