The dorsal surface divides into two unequal parts via the scapular spine which runs across from the posterior scapula before forming the acromion. Three ridges within this fossa allow for tendinous attachment. The ventral surface of the scapula abuts the thoracic rib cage and has a large concavity called the subscapular fossa where the subscapularis attaches. Muscle attachments to these landmarks are covered in the "Muscles" section. The scapula is a site of attachment for many muscles and has several processes, projections, and surfaces for attachment. The scapula has three angles (superior/medial, lateral, inferior), three borders (medial, lateral/axillary, and superior), and two surfaces (ventral and dorsal). The scapula has three processes: the acromion, the spine, and the coracoid process.
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