Question

Which is the part of the pectoral girdle?
(a)Glenoid cavity
(b)Sternum
(c)Ilium
(d)Acetabulum

Answer 1

Hint: Pectoral girdle or shoulder girdle is the set of bones that connects the arms on each side of our body. The bones consisting of the pectoral girdle are two in number in humans but in some species it may be three bones.

Complete answer:
The glenoid cavity is a part of the pectoral girdle or shoulder girdle.
The pectoral girdle is a set of bones that connects to the arms on each side and consists of a clavicle and scapula In the case of humans. The Glenoid cavity is located on the lateral angle of the scapula and is, therefore, a part of the pectoral or shoulder girdle. This cavity is directed laterally and forward and articulated with the head of the humerus and forms the glenohumeral joint.
The surface of the cavity is covered with cartilage that gives attachment to a fibrocartilaginous structure the glenoid labrum. The Glenoid cavity allows the shoulder joint to be mobile allowing 120° of unassisted flexion.

So, the correct answer is "glenoid cavity".

Note: The sternum is located in the central part of the chest and is a flat long bone that connects to the ribs and forms the front side of the rib cage. Along with Ribs, it protects the heart, lungs, and major blood vessels from any kind of injury. The structure of the sternum is like a necktie and has three parts- manubrium, body, and xiphoid process. On the other hand, the ilium is the largest part of the hip bone and in the case of humans is divided into two parts- the body and wing. The acetabulum is the concave surface of the pelvis where the head of the femur meets with the pelvis and forms the hip joint.