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Multiple Choice
Which part of the rib articulates with the bodies of the thoracic vertebrae?
A
Shaft
B
Tubercle
C
Neck
D
Head
Verified step by step guidance
1
Step 1: Understand the anatomy of the rib and its articulation points. The rib has several parts, including the head, neck, tubercle, and shaft. Each part serves a specific function in connecting to other structures.
Step 2: Learn about the thoracic vertebrae. The thoracic vertebrae are part of the spine and have facets on their bodies and transverse processes that allow articulation with the ribs.
Step 3: Focus on the head of the rib. The head of the rib contains two articular facets that connect to the costal facets on the bodies of two adjacent thoracic vertebrae. This articulation forms the costovertebral joint.
Step 4: Differentiate the other parts of the rib. The tubercle of the rib articulates with the transverse process of the thoracic vertebrae, forming the costotransverse joint. The neck and shaft do not directly articulate with the vertebral bodies.
Step 5: Conclude that the head of the rib is the correct answer because it specifically articulates with the bodies of the thoracic vertebrae at the costovertebral joint.