Sternum (G. sternon, the chest)

Manubrium (L. handle)
Jugular notch (L. jugulum, throat)
Clavicular notch and facet (L. clavicula, small key)
function - articulates with clavicle (articular disc)
Anterior surface
attachments - sternocleidomastoid muscle
Posterior surface
attachments - sternohyoid and sternothyroid muscles