This illustration represents the costo-vertebral angle in adults. The costo-vertebral angle is the angle formed by the rib with respect to the vertebra at the level of the joint between these two bones. Small anatomical reminder, the ribs articulate with the corresponding vertebrae at the costo-vertebral joints. These joints consist of two joints for each rib. The first joint is the costo-corporeal joint. It is located between the costal head and the vertebral body of two vertebrae. It is invisible in this view. While the second joint is between the costal tuberosity and the transverse process of the lower vertebra. It is the costo-transverse joint, visible on this posterior view. In the rib cage of an adult, the ribs slope downward, and form an acute angle. The second joint is located between the costal tuberosity and the transverse process of the lower vertebra. it is the costo-transverse articulation, visible on this posterior view. In the rib cage of an adult, the ribs slope downward, forming an acute angle.