Question

Which one of the following statements is true ?

• A. Head of humerus bone articulates with acetabulum of pectoral girdle
• B. Head of humerus bone articulates with glenoid cavity of pectoral girdle
• C. Head of humerus bone articulates with a cavity called acetabulum of pelvic girdle
• D. Head of humerus bone articulates with a glenoid cavity of pelvic girdle

Answer 1

Answer: (B)

Each pectoral girdle consists of two bones : $1$ clavicle and $1$ scapula. At the point where the superior and lateral borders of the scapula meet, there is a lateral angle which presents a shallow articular surface termed as glenoid cavity into which the head of the humerus is articulated.