Sternum : It lies in the centre in thoracic region on ventral sides. It is a flat bone on the ventral midline of thorax.

Functions of sternum :

1. It provides the position for the attachment of ribs.

2. It takes part in the formation of rib cage which protects the heart and lungs.

The two occipital condyles (dicondylic skull) help in the articulation of the skull region with the superior region of the vrtebral column.

Skeletal system : It forms the main supporting frame work of the body. It consists of the framework of bones and a few cartilage. The system plays a major role in the movement of the body.