32 PHYSIOLOGY AND TEMPERANCE. 



29. The Ankle. This is also a hinge joint, and is formed 

 by the lower ends of the two bones of the leg clasping be- 

 tween them, as sugar-tongs clasp a piece of sugar, the highest 

 bone of the arch of the foot. The larger of the two leg bones 

 is called the tibia, or shin bone. It has a sharp border down 

 the front, which, being covered only by skin, is very sensitive 

 to the touch, as every child knows who bruises his shins. 



FIG. 11. The Bones of the Foot and the Ankle. 



Lower down, this bone forms the inner ankle bone. The 

 fibula, or splint bone, is a long, slender bone lying along 

 the outside of the leg, and ends below in what is called the 

 outer ankle. 



30. The Foot. While there are eight carpal bones at the 

 wrist, there are but seven bones at the ankle, called the tarsal 

 bones. They are very irregular, and vary much in size, the 



