First book in hygiene;: A primer of physiology,
Book Description
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.1903 Excerpt: ... XXXIIL--THE SKIN AND THE KIDNEYS. A LESSON FOE STUDY. Sweat I'ore We will now talk about the way in which the body gets rid of some of the waste materials.. The skin and the kidneys together,...
MoreThis 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.1903 Excerpt: ... XXXIIL--THE SKIN AND THE KIDNEYS. A LESSON FOE STUDY. Sweat I'ore We will now talk about the way in which the body gets rid of some of the waste materials.. The skin and the kidneys together, acting in much the same way, form a very large part of the sewer system of the body. By means of them we Glands rid the body of the waste products that Ce" would be injurious. The Skin.--The-Oil Fat skin is the soft, satin A section of Skin, greatly magnified, showing the like COVenng Of the two layers, the glands, and a hair shaft.-,--i/, , Ti body, and fits it like a smooth glove or closely fitting garment. It is so elastic that it is never too large or too small. If you take up a little fold of the skin, you will notice that it can be stretched like a sheet of India-rubber. Hair Bulb Blood Tube Like rubber, when you let go, the skin quickly contracts and looks as before. Two Skins.--Perhaps you do not know that you have two skins, or rather, two layers of skin. There is an outer one called the scarf skin, and directly beneath it the true skin. If you have ever tried to make a whistle from a piece of a branch or twig, you have noticed that there are really two barks: an outer bark, almost as thin as paper in young trees, thick and rough in older ones, and an inner bark that fits tightly against the wood of the tree. A good deal of the outer bark can be peeled off without doing the tree much harm. But if you strip off any of the inner bark, you are apt to do the tree great injury. The Scarf Skin.--Our bodies are very much like trees, in that they also have two skins. You can run a pin through the thin outer layer, or scarf skin, without causing pain, because it has no blood or nerves. It is this outer skin that puffs up when we have a blister caused by rubbing or burn...
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