. Elementary biology, animal and human. Biology. 150 HUMAN BIOLOGY accidents to the skeleton, medical assistance should be summoned and the following directions carefully followed: (1) the sprained member should be placed at once in cold water or in hot water and held there for some time; (2) arnica or witch hazel may be appUed; (3) the sprain should then be boimd in a tight bandage (these three applications tend to keep down the swelling); and (4) (most important of all) the joint should have complete rest until all swelling and soreness have disappeared. It is probable that more permanent in
. Elementary biology, animal and human. Biology. 150 HUMAN BIOLOGY accidents to the skeleton, medical assistance should be summoned and the following directions carefully followed: (1) the sprained member should be placed at once in cold water or in hot water and held there for some time; (2) arnica or witch hazel may be appUed; (3) the sprain should then be boimd in a tight bandage (these three applications tend to keep down the swelling); and (4) (most important of all) the joint should have complete rest until all swelling and soreness have disappeared. It is probable that more permanent injuries result from careless treatment of sprains than from aU other accidents to the skeleton. attachmenta of tendons to radius attachment of tendons to shoulder III. The Muscles 220. Importance of muscle tissue. — Muscle tissue constitutes 41 per cent, or almost half, of the weight of the human body. In this kind of tissue is found one fourth of aU the blood. But the importance of muscle tissue is appreciated, even more fuUy, when we reaUze that practically every kind of movement in the body is due to the action of the mus- cles. Not only do they bring about the more obvious mo- tions of the arms (Fig. 47), the legs, the trunk, and the head, but also the contractions of the heart, of the stomach, and of the other internal organs. Every change in the expression of the face, and every variation in the tone of the voice, is likewise a result of the action of this all-important tissue. Hence we are not sur- prised that there are over five hundred separate muscles, which vary in length from the fraction of an inch (within the ear cavity) to over a foot and a half (down the front of the thigh). 221. Kinds of muscle. — All of these muscles are in one way or another under the control of the nervous system. Some of them are. FlQ. elbow 47.—Action of biceps Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912
