Anterior midline bone articulates with costal cartilages and clavicles
Sternum
The upper seven ribs. They articulate anteriorly by their costal cartilages with the sternum. (called vertebrosternal)
TRUE
The 8th, 9th and 10th, each of their costal cartilage joins the one above it. (called vertebrochondral)
FALSE
11th and 12th don’t join the sternum having a free anterior end. (called vertebral)
FLOATING
is in the form of a bony ring lacking body and spine. articulates with occipital condyles at the atlanto-occipital joint which allows flexion and extension of the head.
ATLAS
has the dens (odontoid process) which articulates with the altas at the atlanto-axial joints which allow side to side movement of the head.
AXIS
costal facets on the body of the thoracic vertebra articulate with facets on the head of rib.
SUPERIOR AND INFERIOR
on the transverse process of the thoracic vertebra articulates with facet on the tubercle of rib.