How many pairs of ribs are "floating ribs" that do not articulate with the sternum?
A)5
B)2
C)7
D)12
E)10

Question

Quizplus · Accepted Answer

The last two pairs of ribs (11 and 12) are considered "floating ribs" because they do not connect to the sternum. Therefore, there are only two pairs of floating ribs. Choice A is incorrect as there are a total of 12 ribs on each side of the body, including the floating ribs. Choice C and D are incorrect as there are 7 true ribs (which directly connect to the sternum) and 5 false ribs (which indirectly connect to the sternum). Choice E is also incorrect as there are not 10 pairs of ribs (there are only 12 total ribs on each side of the body).

How Many Pairs of Ribs Are "Floating Ribs" That Do