Which bone articulates with the scapula at the glenoid cavity?

• A. Clavicle
• B. Humerus
• C. Ulna
• D. Radius

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by identifying the anatomical location of the scapula. The scapula, also known as the shoulder blade, is a flat triangular bone located in the upper back region.
2. Step 2: Understand the function of the glenoid cavity. The glenoid cavity is a shallow depression on the lateral aspect of the scapula that serves as the socket for the ball-and-socket joint of the shoulder.
3. Step 3: Recall the anatomy of the bones involved in the shoulder joint. The humerus is the long bone of the upper arm, and its rounded head fits into the glenoid cavity to form the glenohumeral joint.
4. Step 4: Eliminate the other options based on their anatomical relationships. The clavicle articulates with the scapula at the acromion, not the glenoid cavity. The ulna and radius are bones of the forearm and do not directly articulate with the scapula.
5. Step 5: Conclude that the humerus is the correct answer, as it articulates with the scapula at the glenoid cavity to form the shoulder joint.