The pectoral girdle is an incomplete ring because it is open in the back between the scapulae.
The scapula, often known as the shoulder blade, is the name for one of the two main vertebrate shoulder girdle bones. They are triangular and situated on the upper back of humans between the second and eighth rib levels.
The clavicle and the scapula make up the pectoral girdle, which connects the upper limb to the sternum of the axial skeleton. The shoulder blade, or scapula, is located on the back of the shoulder.
Learn more about pectoral girdle here:
https://brainly.com/question/17205866
#SPJ1
