28 



ANATOMY FOB, NUESES. 



[CHAP. IV. 



ity of the ulna. The lower end of the radius is large, and 

 forms the chief part of the wrist. 



The carpus, or wrist, is formed of 

 small pieces of bone united by liga- 

 ments; they are arranged in two 

 rows and are closely welded to- 

 gether, yet by the arrangement of 

 their ligaments allow of a certain 

 amount of motion. There are eight 

 carpal bones in each wrist; they are 

 named from their shape, scaphoid, 

 semilunar, cuneiform, etc. 



Each metacarpus is formed by five 

 bones. These metacarpal bones are 

 curved longitudinally, so as to be 

 convex behind, concave in front; 

 they articulate by their bases with 

 the bones of the wrist and with one 

 another, and the heads of the bones 

 articulate with the phalanges. 



The phalanges, or digits, are the 

 bones of the fingers; they are four- 

 teen in number (in each hand), 

 three for each finger, and two for 

 the thumb. The first row articu- 

 lates with the metacarpal bones and 

 the second row of phalanges ; the 

 second row, with the first and third; 

 and the third, with the second row. 

 Bones of lower extremity : 



Os iimominatum (hip bone) ... 2 



Fia. 19. - THE ULNA AND Femur (thigh bone) 2 



RADIUS. 1, radius; 2, ulna; -~ . ,, \, ' N o 



o, olecranon process, on the Patella (knee pan) 2 



anterior surface of which are Tibia, 2 \ /-, . 



seen the large (gs) and the Fibula 2 P ^ 



small (Is) cavities for the recep- m / i i \ -\ A 



tion of the lower end of the Tarsus (ankle) . 



humerus and of the head of Metatarsus (sole and instep of foot) . 10 



the radius, respectively; h, phalanges (toes) 28 



head of radius. 



62 



The bones of the lower extremity correspond to a great 

 extent with those of the upper extremity, and bear a rough 



