Generally speaking, abbreviations such as sched. or SKDs. (SKDs capitalized is mostly within military/governmental usage) will not appear in prose or similarly written texts. They are reserved for titles, headlines, shorthand notes, or other areas where space is a concern.
The pectoral girdle is an imcomplete ring because it is open in the back between what? The KGB Agent answer: The pectoral girdle is an incomplete ring because it is open in the back between the scapulae.
AXIAL MUSCLES ANATOMY The main muscle which is attributed to keeping the humerus attached to the pelvic girdle is the large muscle known as the pectoralis major. This fan shaped muscle is the key flexor muscle located within the pectoral girdle.