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Hospital Corpsman 3 & 2 - Intro Navy Nursing manual for hospital training purposes | Next
Figure 3-20.—Forearm and hand. |
Figure 3-19.—Shoulder girdle and arm bone.
the forearm, the wrist, and the hand (figs. 3-19
and 3-20). The specific bones that form the
framework for the upper extremity are:
Clavicle . . . . . . . . collarbone . . . . . . . . . 2
Scapula . . . . . . . . . shoulder blade . . . . . . 2
Humerus . . . . . . . . arm bone . . . . . . . . . . 2
Radius and ulna . . forearm bones . . . . . . 4
Carpals . . . . . . . . . wrist bones . . . . . . . 16
Metacarpal. . . . . . . bones of the palm . . . 10
Phalanges . . . . . . . finger bones . . . . . . . 28
The CLAVICLE forms the front part of the
shoulder girdle. It lies nearly horizontally just
above the first rib and is shaped like a flat letter
S. The clavicle is a thin brace bone that fractures
easily. Its inner end is round and attached to the
sternum; its outer end is flattened and fixed to
the scapula.
The SCAPULA is a triangular bone that lies
in the upper part of the back on both sides, be-
tween the second and seventh ribs, forming the
posterior portion of the shoulder girdle. Its lateral
corner forms part of the shoulder joint, ar-
ticulating with the humerus.
The HUMERUS is the longest bone of the up-
per extremity and is often called the arm bone.
It articulates with the shoulder girdle to for-m the
shoulder joint and with the bones of the forearm
to form the elbow. Its anatomical portions include
a head, a rounded portion that fits into a recess
of the scapula called the glenoid fossa; the greater
and lesser tuberosities, which are enlargements of
the superior end; the surgical neck, a slight nar-
rowing distal to the tuberosities and a frequent
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