The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . ation which followsthe injury involves theparts about the joint,and sometimes the jointitself, which maybe leftstiff and almost useless Fig. is.—Fractured humerus, showing fqj- g^ lon^ time aftcr-how the muscles pull the ends of the , ^^^i • • broken bone out of place. Ward. This IS particu- larly the case with frac-tures near the wr
The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . ation which followsthe injury involves theparts about the joint,and sometimes the jointitself, which maybe leftstiff and almost useless Fig. is.—Fractured humerus, showing fqj- g^ lon^ time aftcr-how the muscles pull the ends of the , ^^^i • • broken bone out of place. Ward. This IS particu- larly the case with frac-tures near the wrist, for the slow recovery of whichthe surgeon is so often blamed. 30. Dislocations. — When a bone is dislocatedthere is always a certain amount of injury to theparts about the joint. The ends of the bone are socarefully and strongly guarded and fastened by lig-aments and muscles, that these must necessarily beconsiderably torn and bruised, in order to let thebone out of its place. Thus it happens that a dis-location often gives rise to more pain and sufferingimmediately after the accident than a fracture.* * Sometimes the violence resulting from a fall is not sufficient eitherto break or dislocate a bone, and yet the parts about a joint are so se-. INJURIES OF BONES AND JOINTS. 29 The vast majority of dislocations occur in theshoulder and hip joints, and are usually caused bya blow on the end of the bone when the limb isfirmly extended, as when a person is falling and triesto save himself by stretching- out his hand. Thelower jaw is sometimes dislocated, and then themouth remains wide open until the dislocation isreduced^ rendering- the sufferer a somewhat ludi-crous as well as pitiable sight. This accident hasbeen known to occur during a prolonged yawn. 31. Healing of Injured Bones.—A fractured bonetakes from three to six weeks, and sometimes longer,to become healed. A dislocated bone, after it is re-duced, requires to be kept quiet until all pain andswelling have s
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