In the mid ventral region of thorax of Rabbit sternum is present. It is made by five bony pieces called "Sternabrae". It is called "mesosternum". This will show "presternum" anteriorly. It is a long bony piece. It is connect­ed with clavicles. On the lower side mesosternum it articulates with xiphi-sternum, which ends with xiphoid cartilage.

The ribs articulated with sternum by their cartilage part. In rabbit the first pair of ribs are attached to the presternum.

Uses of sternum :Thus sternum gives strength and support to the body on the ventral side. It helps in the process of respiration also.