Ribs 1-12

False Ribs (8-12)

Inferior 5 pairs, they attach to the sternum either indirectly or not at all.

Neck

Just lateral to the head

Tubercle

Knoblike, articulates with the transverse process of the thoracic vertebra of the same number

True ribs (1-7)

Superior 7 pairs, attached directly to the sternum by the costal cartilages

Shaft

The bulk of the rib, superior border is smooth and its inferior border is sharp and thin with costal groove on its inner face

Angle

The shaft curve sharply anteriorly (closer to the spine) and extends to the costal cartilage anteriorly

Floating Ribs (11-12)

They have no anterior attachments

Facet of the tubercle

an oval facet on the inferomedial part of the tubercle of a rib for articulation with a facet on the transverse process of a vertebra

Costal cartilage

the bars of hyaline cartilage that serve to prolong the ribs forward. only found at the anterior ends of the ribs