The anterior (front) side of the scapula shows the fossa subscapularis (subscapular fossa) to which the subscapularis muscle attaches. See ' ossification centers of the pectoral girdle' for information on the scapular ossification centers.It has two surfaces, three borders, and three angles. The scapula is surrounded by an arterial anastomosis, the scapular anastomosis which aims to ensure an adequate supply of blood to the upper limb, but has the added benefit of adequate supply to the bone itself.

glenohumeral ligaments: upper, middle, and lower bands.

transverse scapular ligament: crosses suprascapular notch, with the suprascapular nerve below (within the resulting foramen) and the suprascapular vessels above.

infraglenoid tubercle: long head of triceps muscle.

supraglenoid tubercle: long head of biceps muscle.

inferior angle: teres major muscle, a small slip of latissimus dorsi.

vertebral border (posterior): levator scapulae, rhomboid minor muscle, rhomboid major muscle.

lateral border (margo lateralis): teres minor muscle, teres major muscle.

coracoid process: coracobrachialis, pectoralis minor, short head of biceps muscle.

scapular spine: spinous part of deltoid muscle, trapezius.

acromion: acromial part of deltoid muscle, trapezius.

transverse scapular ligament and adjacent superior border of blade: inferior belly of omohyoid.

subscapular fossa: subscapularis muscle, serratus anterior.

infraspinous fossa: infraspinatus muscle, teres minor muscle.

supraspinous fossa: supraspinatus muscle.

glenoid cavity: humeral head (forming the glenohumeral joint).

acromion: clavicle (forming the acromioclavicular joint).The spinoglenoid notch lies posteriorly behind the neck. The suprascapular notch lies immediately medial to the base of the coracoid process. Laterally is the glenoid fossa, anteriorly is the coracoid process and superiorly is the acromion that is continuous with the scapular spine and arcs anteriorly over the humeral head.

Anteriorly, on the costal surface, is the shallow subscapular fossa. Posteriorly, the scapula is divided into a supraspinous fossa and infraspinous fossa by the scapular spine. The main part of the scapula, the body, consists of a somewhat triangular-shaped flat blade, with an inferiorly pointing apex, referred to as the inferior angle as well as lateral and superior angles. The scapula is described as having superior, medial, and lateral borders.

Is scapula a flat bone