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headThe pedicle of the rib articulates with the transverse process of the thoracic vertebra.
The surface that articulates with the ribs which is simply called the the "Demi-Facet" for the head of the rib. There is also a part on the transverse process of the thoracic vertebrae which acts as a block to prevent the rib from moving posteriorly.
The clavicle. This bone is normally not consideredto be part of the shoulder an instead a part of the thorax, which is also true. The reason it is part of the shoulder is that it joint part of the scapula to form the soked of the glenohumeral joint.
Sacrum
Spinal column.
The clavicle is the only shoulder girdle bone that articulates with the sternum.ClavicleThe clavicle is part of the pectoral girdle and its proximal part articulates with the sternum.
head of radius
One side of the pubis articulates interiorly with the other side of the pubis, joining at the pubic symphysis. Posteriorly it articulates with the sacrum, the Acetabulum proximally articulates with Femur bone. So therefore there are three articulation points for the pelvic girdle.
The centrum is a part of all the vertebra which make up the spine. It is the solid part in the centre of the vertebra. The plural of centrum is centra.
Body
Since the dens is part of the Axis vertebra (and project up in the first vertebra, the Atlas vertebra that supports the skull) it is called the Dens Axis
A 'Vertebra' is one bone in a spine. 'Vertebrae' (ver-tuh-bray) is a word for more than one vertebra, as in, "There are 12 vertebrae in the thoracic part of the spine." Or, "His second cervical vertebra was fractured".