. The eclectic guide to health; or, Physiology and hygiene ... skull less liableto There are fourteen bonesof the face. They are firmlyfastened upon the front andlower portions of the skull. They are rigidly united with,one another, excepting the lower jaw, which is free tomove in opening and closing the mouth. These bones areextremely irregular in shape. They form the sockets of theeyes, the bridge of the nose, the prominence of the cheeks,the roof of the mouth, and the jaws. There is a U-shaped bone at the base of the tongue,called the hyoid bone, that aids in moving the throat in
. The eclectic guide to health; or, Physiology and hygiene ... skull less liableto There are fourteen bonesof the face. They are firmlyfastened upon the front andlower portions of the skull. They are rigidly united with,one another, excepting the lower jaw, which is free tomove in opening and closing the mouth. These bones areextremely irregular in shape. They form the sockets of theeyes, the bridge of the nose, the prominence of the cheeks,the roof of the mouth, and the jaws. There is a U-shaped bone at the base of the tongue,called the hyoid bone, that aids in moving the throat inswallowing and in speaking. 14. The bones of the trunk are divided into: (1) thebones of the spinal column; (2) the bones of the chest;(3) the bones of the pelvis. The spinal column, or backbone, extends from the head along the back, and supportsthe upper part of the body on the pelvis. This column isformed of twenty-four pieces, called vertebrae. Thesevertebrae are placed one upon another, with layers of car- Fig. The Skull.—1. Sutures. 14 PHYSIOLOGY. V-. Vertebra, Side View.—1. Body. tilage cartilage al-lows each verte-bra to move The com-bined motion ofthe vertebrae en-ables the spinalcolumn to bendreadily in any di-rection. The col-umn is exceed-ingly strong. Anopening ex-tends lengthwisethrough the cen-ter of this col-umn, for holdingthe spinal cord. Each vertebra is broad in front.
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