SCAPULA
The scapula is a flat triangular-shaped bone.
The scapula is lying on the posterior chest wall superficial
to the ribs and separated from them by muscles, and the part of the posterior thorax between the levels of the second and seventh ribs.
- A prominent ridge, the spine , runs diagonally across the posterior surface of the flattened,triangular body of the scapula
At the lateral angle is a shallow articular surface,the glenoid cavity ,which ,with the head of
the humerus ,forms the shoulder joint .
On the posterior surface runs a rough ridge called SPINE, which extends beyond the lateral
border of the scapula and overhangs the glenoid cavity.
The prominent overhanging , which can be felt through the
skin as the highest point of the shoulder ,is called the ACROMION PROCESS and forms a joint with the clavicle , THE ACROMIOCLAVICULAR joint, a slightly
movable synovial joint that contributes to the mobility of the shoulder gridle
.
The CORONOID PROCESS , a projection from the upper border of the
bone,gives attachment to muscles that move the shoulder joint.
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