. Public School Physiology and Temperance. FiO. 10.—The Mechanism of the Hip Joint. The large end of this bone rests upon the broad, flat end ofthe shin bone, forming the knee joint. This hinge joint isprotected in front by a flat three-sided bone, the patella, orknee-pan. Although the knee is greatly exposed, the broadjoint surface, with its strong ligaments and tendons, enablesit to resist violence, and dislocation does not frequentlyhappen. Indeed, fracture of one of the bones is more likelyto occur. 32 PHYSIOLOGY AND TEMPERANCE. 29. The Ankle.—This is also a hinge joint, and is formedby th
. Public School Physiology and Temperance. FiO. 10.—The Mechanism of the Hip Joint. The large end of this bone rests upon the broad, flat end ofthe shin bone, forming the knee joint. This hinge joint isprotected in front by a flat three-sided bone, the patella, orknee-pan. Although the knee is greatly exposed, the broadjoint surface, with its strong ligaments and tendons, enablesit to resist violence, and dislocation does not frequentlyhappen. Indeed, fracture of one of the bones is more likelyto occur. 32 PHYSIOLOGY AND TEMPERANCE. 29. The Ankle.—This is also a hinge joint, and is formedby the lower ends of the two bones of the leg clasping be-tween them, as sugar-tongs clasp a piece of sugar, the highestbone of the arch of the foot. The larger of the two leg bonesis called the tibia, or shin bone. It has a sharp border downthe front, which, being covered only by skin, is very sensitiveto the touch, as every child knows who bruises his —The Bones of the Foot and the Ankle. Lower down, this bone forms the inner ankle bone. Thefibula, or splint bone, is a long, slender bone lying alongthe outside of the leg, and ends below in what is called theouter ankle. 30. The Foot.—While there are eight carpal bones at thewrist, there are but seven bones at the ankle, called the tarsalbones. They are very irregular, and vary much in size, the THE BONES. 33 largest being the heel bone. As in the hand there are fivemetacarpal bones, so in the foot there are five metatarsalbones. They lie side by side, the inner one not being separ-ated, as in the hand. 31. The Toes.—There are two phalanges in the great toeand three in each of the others, as in the hand, but they aresmaller in size and more limited in their movements. Itastonishes us sometimes, however, to see the extent of motiontraining will give to the toes. People born without arms,or who have lost them by accident, have been taught tocarve, write, and even to paint
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