Espiral Atlas2nd rib
costa secunda
Study entry
Parts
Thinner, less curved and longer than the 1st. The head has two articular surfaces. Its own mark is the tuberosity for the serratus anterior muscle, on the upper surface.
Joints
With the bodies of T1 and T2 (head) and the transverse process of T2 (tubercle); in front, the 2nd costal cartilage reaches the sternum at the level of the sternal angle.
Palpation
The sternal angle marks the level of the 2nd pair of costal cartilages.
Source: cap. 4, «Costillas, cartílagos costales y espacios intercostales»