Question

When describing the rib cage, which of the following is correct? A) 7 true ribs - 3 false ribs - 2 floating ribs B) 6 true ribs - 4 false ribs - 2 floating ribs C) 7 true ribs - 3 false ribs - 1 floating rib D) 6 true ribs - 4 false ribs - 1 floating rib

Answer 1

The correct answer is A.composition of the rib cage is '7 true ribs - 3 false ribs - 2 floating ribs'. True ribs attach directly to the sternum, false ribs attach to the cartilage of the rib above, and floating ribs.

Step-by-step explanation:

When describing the rib cage, the correct composition is '7 true ribs - 3 false ribs - 2 floating ribs'. The rib cage consists of 12 pairs of ribs, divided into true ribs, false ribs, and floating ribs.

The top seven pairs of ribs are considered true ribs; they are directly attached to the sternum via their costal cartilage.

The false ribs are the next three pairs (ribs 8-10), which are not directly attached to the sternum. Instead, they are attached to the cartilage of the rib above.

The lowest two pairs (ribs 11 and 12) are the floating ribs, which do not attach to the sternum at all and have their cartilages terminating within the musculature of the lateral abdominal wall.