THE BONES AND JOINTS. 



23 



6. The hyoid bone is a slender bone shaped like a 

 horseshoe. It is situated in the neck just above Adam's 

 apple, where it may easily be felt. The base of the tongue 

 is attached to it. 



BONES OF THE UPPER LIMB. 



Shoulder. 



Arm. 



SECTION III. 1. The upper limb is divided by anat- 

 omists into shoulder, arm, fore-arm, 

 and hand. In ordinary language, 

 we call all between the shoulder 

 and the hand, the arm. In ana- 

 tomical language, the arm extends from 

 shoulder to elbow; the fore-arm, from elbow 

 to hand. 



2. The bones ,-, 

 of the shoulder are 

 the clavicle, or col- 

 lar-bone, and the 

 scapula, or shoul- 

 der-blade. The 

 collar-bone is 

 about as large 

 around as a finger, 

 and curved in 

 shape. It extends 

 from the upper comer of the 

 breast-bone to the shoulder- 

 blade. It braces the shoulder. 



3. The shoulder-blade is a 

 flat, three-cornered bone, with 

 projections extending from it, to 

 which muscles are attached. At one corner is a smooth 



Hand. 



Fig. 7. 



Fig. 8. 



THE SCAPULA. 1. Processes. 2. 

 Surface for shoulder joint. 



