A rounded articular projection supported on a constricted portion (neck) of a bone is called a:

• A. head
• B. condyle
• C. trochlea
• D. tuberosity

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the anatomical terminology used in the question. The term 'rounded articular projection' refers to a smooth, rounded structure that forms part of a joint and is involved in articulation (movement at a joint).
2. Step 2: Recognize the significance of the 'constricted portion (neck)' mentioned in the question. This indicates that the rounded projection is supported by a narrower segment of the bone, which is characteristic of certain anatomical structures.
3. Step 3: Review the definitions of the options provided: 'head,' 'condyle,' 'trochlea,' and 'tuberosity.' For example: - 'Head' refers to a rounded, prominent articular projection supported by a neck. - 'Condyle' is a rounded projection, but it is not necessarily supported by a neck. - 'Trochlea' is a pulley-shaped structure, typically found in the humerus. - 'Tuberosity' is a roughened area for muscle attachment, not an articular surface.
4. Step 4: Compare the descriptions of the options with the characteristics provided in the question. The presence of a 'neck' supporting the rounded projection is a key feature that aligns with the definition of a 'head.'
5. Step 5: Conclude that the correct anatomical term for a rounded articular projection supported by a constricted portion (neck) of a bone is 'head,' based on the definitions and comparison of the options.