Why are some ribs called floating ribs?

Why are some ribs called floating ribs?

Because they are independent of other bones
Because they attach only with the sternum
Because they lie above the other ribs
Because they are attached only on the posterior side

Final answer:

Floating ribs are called so because they are independent of other bones and are not attached to the sternum. They only connect to the vertebrae on the posterior side.

Explanation:

Floating ribs are a type of rib that is not attached to the sternum (breastbone) and is therefore considered to be independent of other bones. They are called “floating ribs” because they do not attach directly to the sternum like the other ribs. Instead, they are attached only on the posterior side, to the vertebrae of the spine. The “true” ribs, on the other hand, are attached to the sternum through cartilage, while the floating ribs do not have this direct attachment.

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