Question

ribs that join the sternum directly by costal cartilages are called
a false ribs
b true ribs.
c floating ribs
d vertebrochondral ribs

Explanation:

• True ribs (B) are the first 7 pairs of ribs that attach directly to the sternum via costal cartilages.
• False ribs (A) either attach indirectly to the sternum (pairs 8 - 10) or not at all (pairs 11 - 12).
• Floating ribs (C) are the 11th and 12th pairs of ribs that do not attach to the sternum at all.
• Vertebrochondral ribs (D) is another term for false ribs (pairs 8 - 10) which attach indirectly to the sternum.

Answer:

B. True ribs