THE SKELETON 



6 7 



like the radius and ulna, however, one, called the tibia, be- 

 ing much larger than the other, the fibula (Fig. 61). The 

 E latter bone is merely a brace to the large 



tibia, which forms the 



joints with the femur 



above and the foot below. 



There is a bony disk 

 D embedded in the great 



tendon over the knee, 



forming a protection to 



the knee joint; this is 



called the patella, or knee- 

 pan. In which direction 

 "" c can you move the pa- 

 tella to and fro with the 



hand, when the leg is 



straight and the heel 



resting upon the floor? 

 112. Like the hand, 



the foot consists of 



three parts. The tarsus, 



or ankle, is formed of 



seven bones, although 



the carpus has eight. 



The metatarsus, like the 



metacarpus, is composed 



FIG. 63.- Front View Q f fiye bo arran ged FIG 64. -Femur (seen 



of Femur. from behind). 



A fi, i, A t\, parallel to one another. 



A, smooth head of bone j n case o f a f a U } tne femur 



for articulating with w hich SCrVC for the baSC 



The tOCS 



hipbone; C, shaft; 



D and E, rough pro- of the tOCS. 



cesses to which mus- 1.1 i 



cies are attached ; F, have the same number 



would be likely to break 

 at the turn or angle near 

 the hip, if there were 

 not a brace there which 

 prevents this. 



^ of bones as the fingers, 



and have the same name, the phalanges. 

 How many phalanges are there in the great toe ? The leg, 

 like the arm, contains thirty bones. How can this be true 



