Question

Which one of the following is anatomically correct?

• A. Collar bones three pairs
• B. Salivary glands one pair
• C. Cranial nerves ten pairs
• D. Floating ribs two pairs

Answer 1

The correct option is D Floating ribs two pairs

• There are usually 12 pairs of ribs in all. Each pair of ribs is attached to the building blocks of the spine (the vertebrae) in the back.
• There are three types of ribs:

1. Seven ribs which connect directly to the sternum (1-7)
2. Three ribs which connect to the costal cartilages of the rib above (8-10)
3. Two "floating" ribs which connect only at the back (11&12).

• A rib is said to be "floating" if it does not attach to the sternum (the breast bone) or to another rib. Hence, Floating ribs two pairs is anatomically correct.

So, the correct answer is 'Floating ribs two pairs'.