The sternum is a median bone that, with the anterior portion of the ribs, forms the anterior boundary of the bony thorax.
The term [sternum] comes from the Greek, meaning "flat chest or flat surface". In early anatomy, the sternum was known by a Latin term [gladius] referring to the similarity of the sternum to the short sword of the gladiators.
The sternum is composed by three segments, from superior to inferior they are the:
1. Manubrium: This is Latin for "handle" (of the sword)
|The boundary between the manubrium and sternal body is known as the "sternal angle" or the "angle of Louis"named after Antoine Louis, a French physician. Click on the image of the thorax to see a detailed image of the sternum.|