Why Is the Pectoral Girdle an Incomplete Ring?

The pectoral girdle is an incomplete ring because it is open in the back between the... The medial ends of the clavicles areticulate with the what of the sternum? The lateral ends of the clavicles areticulate with the what of the scapulae? ... This divides the scapula into unequal portions.

Is the pectoral girdle incomplete?

The shoulder girdle is also called the pectoral girdle, and it is a bone ring, incomplete posteriorly. The shoulder girdle is formed by two sets of bones: the scapulae, posteriorly, the clavicles anteriorly and completed anteriorly by the manubrium of the sternum (part of the axial skeleton).

What is an incomplete girdle?

The bony ring, incomplete behind, which serves for the attachment and support of the upper limbs. It is formed by the manubrium sterni, the clavicles, and the scapulae. Synonym(s): pectoral girdle, shoulder complex (3) .