The body and its ailments: a handbook of familiar directions for care and medical aid in the more usual complaints and injuries . sdrawn up with force, so that the food is crushed and ground by thelower against the upper teeth; this shortening lasts but for a moment,the muscles are then relaxed, and another set draws the jaw movements go on with rapidity while we continue muscles which move the jaw and lips are seen in Figure 5 Nos. 9, 10 and 11, are those which lift the angle of themouth; 12 and 13 those whichdraw the mouth downward;18 that which draws the mouthba
The body and its ailments: a handbook of familiar directions for care and medical aid in the more usual complaints and injuries . sdrawn up with force, so that the food is crushed and ground by thelower against the upper teeth; this shortening lasts but for a moment,the muscles are then relaxed, and another set draws the jaw movements go on with rapidity while we continue muscles which move the jaw and lips are seen in Figure 5 Nos. 9, 10 and 11, are those which lift the angle of themouth; 12 and 13 those whichdraw the mouth downward;18 that which draws the mouthbackward and presses the foodbetween the teeth; 15 thestrong muscle drawing the jawupward and backward; 22 and24 that which opens the the sinews of some mus-cles, little seed-like bones aresometimes developed. Theyoccur near the joints, particu-larly of the toes and fingers,Muscles about the Jaws. and are more numerous in men than in women. The object of these little bones is to allow thesinew to attach itself at a greater angle to the bone the muscle isdesigned to move, and thus increase its leverage power. The best. The Wonders of the Muscular System. 35 Fis. 6. example of a development of this kind is seen in the knee-pan,seated in the sinew of the great mnscle which extends the is well displayed in Figure 6. The marvelous beauty ofour muscular organization isbest shown, not by the opera-tion of a single muscle, won-drous though it be in itssimplicity and completeness ofmeans to end, but by the sym-metry and harmony of com-bined muscular perfection of our organi-zation, in this respect, is re-markably evinced by the factthat no machinist, howeveringenious, has ever yet suc-ceeded in building up an au-tomaton which can walk likea man. Yet we are able to gothrough the whole series ofcomplex movements necessaryin walking, so readily, as to bescarcely conscious of an effort. Knee-pan and Mnscles. The muscles of different animals, and their limbs, ar
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