THORyfCIC LIMBS. 



65 



a smooth ovoid articular facet by which the bone articulates 

 with the glenoid cavity of the scapula. The head is not 

 separated from the body by a distinct anatomical neck as in the 

 human humerus. 



Along the lateral border of the proximal end of the shaft is 

 a high rough ridge semicircular in side view, the great 

 tuberosity {/>). It gives attachment to muscles and is marked 



?'/ I 



m 



TV- 



Fig. 47. — Humerus, Ventral Side. Fig. 48. — Humerus, Medial Side. 



a, head; 6, greater tuberosity; c, lesser tuberosity; i/, bicipital gioove; e, pectoral 

 ridge;y, deltoid ridge; ^, rough area for insertion of latissimus dorsi and teres major; 

 /i, nutrient foramen; /, cnpitulum; y, trochlea; /, coronoid fossa; w, radial fossa; «, 

 medial epicondyle; o, lateral epicondyle; t/, supracondyloid foramen. 



on its dorsal border by a deep depression for the tendon of the 

 infraspinatus muscle. On the medial margin of the proximal 

 end closely associated with the head is a smaller elevation, the 

 lesser tuberosity (c), also for muscular attachment. 



Between the greater and lesser tuberosities on the ventral 



