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DAA Exam 1 Practice
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Why is T10 atypical?
Only a full pair of facets, articulates with rib 10
Has demi facets for ribs 9 and 10
Lacks costal facets
Has three facets per side
Reveal Answer
Correct Answer:
Only a full pair of facets, articulates with rib 10
Explanation:
In thoracic vertebrae, rib articulation is carried by costal facets on the body and a transverse facet on the transverse process. Most thoracic vertebrae have two demi-facets on the body that accommodate the head of a rib, working with the vertebra above and below. Tenth thoracic vertebra stands out because its body carries a single, complete costal facet for the tenth rib, rather than the usual pair of demi-facets. This makes the pattern of rib articulation on T10 different from the typical thoracic vertebrae.
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