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Multiple Choice
Which specific part of the elbow is formed by the distal end of the humerus?
A
Coracoid process
B
Radial tuberosity
C
Acromion
D
Olecranon fossa
Verified step by step guidance
1
Understand the anatomy of the elbow joint: The elbow is a hinge joint formed by the articulation of three bones—the humerus (upper arm bone), radius, and ulna (forearm bones). The distal end of the humerus plays a key role in forming the elbow joint.
Identify the specific structures of the distal humerus: The distal end of the humerus includes features such as the olecranon fossa, coronoid fossa, and trochlea. These structures interact with the ulna and radius to form the joint.
Focus on the olecranon fossa: The olecranon fossa is a deep depression located on the posterior side of the distal humerus. It accommodates the olecranon process of the ulna when the elbow is extended.
Clarify why the other options are incorrect: The coracoid process is part of the scapula, the radial tuberosity is a feature of the radius, and the acromion is part of the scapula. None of these structures are located on the distal humerus or involved in forming the elbow joint.
Conclude that the olecranon fossa is the correct answer: It is the specific part of the distal humerus that interacts with the olecranon process of the ulna to form part of the elbow joint.