7. The Skeletal System
The Thoracic Cage
Multiple Choice
Multiple ChoiceThe 11th and 12th ribs are called floating ribs because they lack __________.
A
an anterior attachment to lumbar vertebrae
B
an anterior attachment to the sternum
C
a vertebral attachment anteriorly
D
a posterior attachment to thoracic vertebrae
E
a vertebral attachment posteriorly
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