Thoracic Bones
neck of the rib
A constricted portion situated between the head and the tubercle
tubercle of the rib
A prominence of the outer surface of the rib at the junction of the neck with the shaft; it has a facet for articulation with the transverse process of the corresponding vertebra
sternal angle (Angle of Louis)
Angle that articulates the manubrium with the body of the sternum (manubriosternal joint); landmark for attachment of second pair of ribs
facets for clavicles
Articulation points for clavicles
facets for first and second costal cartilage
Articulation points for costal ribs
head of rib
Has 2 facets for articulation with the numerically corresponding vertebral body and that of the vertebra immediately above: SUPERIOR / INFERIOR COSTAL FACETS
body of the sternum
Has 2 joints (manubriosternal and xiphisternal); sides are notched with facets for articulation with costal cartilages
shaft of the rib
Is thin, flattened, and twisted on its long axis; its inferior border has the COSTAL GROOVE for nerves and vessels
STERNUM
Lies in the midline of the anterior chest wall. It is a flat bone that can be divided into 3 parts.
suprasternal notch / sternal notch
Notch on superior portion of manubrium
vertebrosternal ribs
Rib pairs 1-7 which are attached anteriorly to the sternum by their costal cartilages
vertebrochondral ribs
Rib pairs 8-10 which are attached anteriorly to each other and to the seventh rib by means of their costal cartilages and small synovial joints
vertebral ribs
Ribs 11-12 have no anterior attachments and are referred to as floating ribs
xiphoid process
The lowest and smallest part of the sternum. It is a thin plate of hyaline cartilage that becomes ossified at its proximal end in adult life.
THORAX
The part of the body between the neck and the abdomen that has in its walls a bony cartilaginous cage formed by the sternum, costal cartilages, ribs, and the bodies of the thoracic vertebrae
manubrium sterni
Upper part of the sternum
angle of the rib
Where the shaft of the rib bends sharply forward