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Thursday, 6 December 2018

Ribs and Sternum

Twelve pairs of ribs and the sternum form the rub cage. In humans, the sternum is a single bone, while that in rabbits consists  of seven small bones. The ribs articulate with the thoracic vertebrae at the back and curve to the front to attach, by means of elastic cartilage, to the sternum. However, in humans, only the first ten pairs are attached to the sternum. The last two pairs remain free and are known as floating ribs.

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