a, medial end; b, lateral end.
Clavicle. Clavicula
([Fig. 46]).—The clavicle in the cat is greatly reduced. It is a slender curved rod of bone imbedded in the muscles of the shoulder and connected by fibrous tissue to the apex of the acromion process. The lateral end (b) is slightly enlarged.
Humerus
([Figs. 47] and [48]).—The humerus forms the support of the upper arm and articulates by its proximal end with the scapula at the glenoid cavity, and by its distal end with the radius and ulna, the bones of the lower arm. It is a nearly cylindrical bone with enlarged ends, and is so curved that its dorsal and ventral borders are hooked at the opposite ends so that it has the form of an Italic f.
The proximal end of the bone bears on its dorsomedial portion a thickening, the head of the humerus (a), which bears 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.
[Fig. 47].—Humerus, Ventral Side.
![[Fig. 47]](#3418956513767812439_illo065alg.jpg.id-2745707686712503627.wrap-0.html.html){kind=link}
[Fig. 48].—Humerus, Medial Side.
![[Fig. 48]](#3418956513767812439_illo065blg.jpg.id-1989064387884563719.wrap-0.html.html){kind=link}