Where the scapula sits in the skeleton
The scapula is a flat triangular bone on the upper back, over the ribs. Its shallow socket forms the shoulder joint with the humerus, and many muscles that move the shoulder and arm attach to it. The spine of the scapula crosses its back and continues outward as the acromion at the tip of the shoulder, and the coracoid process projects forward. The head of the humerus rests in its shallow glenoid cavity.
Frequently asked questions
Which part of the skeleton is the scapula in?
The scapula is one of the bones of the shoulder and arm. The clavicle and scapula attach the arm to the trunk, and the humerus, radius and ulna form the arm.
Which bones make up the shoulder and arm?
Each shoulder and arm is made of five bones: the clavicle, scapula, humerus, radius and ulna. The bones of the hand continue beyond them.
Is there one scapula or a pair?
The scapula is paired: there is one on the left and one on the right, and this page covers both.
Which muscles make up the rotator cuff?
Four: the supraspinatus, infraspinatus, teres minor and subscapularis. All start on the scapula and attach around the head of the humerus, wrapping the shoulder joint.
Other bones of the shoulder and arm
Joints of the scapula
Compare with similar bones
Bone counts
By region
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Once the 3D model loads you can turn it and select each part.