This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...by the wind, and it takes a large amount of heat to evaporate water. The heat required to evaporate the water on the finger is taken from the finger itself, leaving this somewhat cooled. In the same way the sweat that is poured out upon the skin is evaporated, taking heat from the body and leaving this correspondingly ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...by the wind, and it takes a large amount of heat to evaporate water. The heat required to evaporate the water on the finger is taken from the finger itself, leaving this somewhat cooled. In the same way the sweat that is poured out upon the skin is evaporated, taking heat from the body and leaving this correspondingly cooler. The more we perspire the more the evaporation of the sweat cools our bodies. The sweat glands are connected with the brain through nerves, and when the body has too much heat a message from the brain makes the glands begin to secrete sweat profusely. The sweat is rapidly evaporated, and in this way we get rid of the extra heat that would make the blood too hot, if there were no way of escape. The evaporation of the sweat takes so much heat that the body is kept at its ordinary temperature, no matter how warm the day may be. Dogs do not sweat very much, and are apt to suffer greatly from the heat of summer. By their rapid breathing, or panting, they take in large quantities of air, which, passing through the lungs and taking heat from the blood, helps to keep down the temperature of the body. "Taking Cold."--There are people who seem to take a certain pride in their sensitiveness to drafts, and who are always ready, and expecting, to "take cold." Such persons usually do take cold oftener than other people, because they wrap their necks closely when out of doors, and in the house they sit near a register or with shawls about the shoulders if the air of the room is a bit chilly. Now "taking cold" is a habit which may be almost wholly avoided, if we will learn to treat the skin properly. In the first place, colds are not due to exposure to cold. Explorers do not take cold when in the Arctic regions, although t...
Read Less
Add this copy of An Elementary Physiology and Hygiene for Use in Schools to cart. $61.07, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2019 by Wentworth Press.
