In medical terms, what are the ribs known to be?

The ribs are considered part cartilaginous bones because they consist of both bony and cartilaginous components. Each rib has a bony structure that provides strength and support, while the costal cartilage at the front of the ribs contributes to flexibility and allows for the expansion of the chest during breathing. This combination of bone and cartilage is essential for the ribs to function effectively in protecting vital organs like the heart and lungs, as well as facilitating respiration.

The connection of the ribs to the sternum through costal cartilage allows for movement, which is necessary for the lungs to expand and contract. This dual structure of bones and cartilage defines the ribs as part cartilaginous bones in anatomical terms.