: What is the function of the interchondral joints?

The interchondral joints are articulations between the cartilages of the ribs. These joints are typically found between the costal cartilages of the sixth, seventh, and eighth ribs, and occasionally between the fifth and sixth ribs.

The main function of the interchondral joints is to provide flexibility and allow for movement of the ribs during respiration. While the majority of the rib cage is relatively rigid to protect the vital organs, the interchondral joints allow some degree of movement between the ribs, facilitating the expansion and contraction of the thoracic cavity during breathing. This movement helps increase the volume of the chest cavity during inhalation and decrease it during exhalation, aiding in the process of respiration.