Chapter 7, Problem 1RFT

shoulder.............................................

Match each numbered item with the most closely related lettered item. Use letters for answers in the spaces provided.

Summary Introduction

To review:

Match the term shoulder with the most closely related description given below:

Tibia

Pectoral girdle

Radius

Phalanges

Pelvic girdle

Femur

Infraspinous fossa

Calcaneus

Ilium

Humerus

Introduction:

The upper limb skeleton is mostly composed of the carpal bones (present in the wrist), the metacarpals and phalanges (present in the hand), the humerus (present in the arm), and the ulna and radius (present in the forearm). Both the arms join the trunk through the shoulder girdle. It is also known as the pectoral girdle and is composed of the scapula and the clavicle.

Explanation of Solution

The scapula of the pectoral girdle joins the humerus at the shoulder joint, also known as the glenohumeral joint. The acromion and the coracoid structures of the scapula attach the tendons and ligaments of the glenohumeral joint. The clavicle joins the axial skeleton with the pectoral girdle. Thus, the bones of the pectoral girdle (scapula and clavicle) hold the shoulder joint in place.

Conclusion

Therefore, it can be concluded that the term shoulder can be correctly matched with option (b) pectoral girdle.