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$\displaystyle 8^{\text {th }}, 9^{\text {th }}$ and $\displaystyle 10^{\text {th }}$ pairs of ribs articulate directly with the sternum.

$\displaystyle 11^{\text {th }}$ and $\displaystyle 12^{\text {th }}$ pairs of ribs are connected to the sternum with the help of hyaline cartilage.

Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.

There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.