Which of the Following Muscles is NOT a Muscle of the Abdominal

Question

Which of the following muscles is NOT a muscle of the abdominal wall?
A)Rectus abdominis
B)External oblique
C)Transversus abdominis
D)Internal intercostal
E)All of these are muscles of the abdominal wall.

Accepted Answer

The internal intercostal muscle is not a muscle of the abdominal wall; rather, it is a muscle located between the ribs that is involved in respiration. The other options listed are all muscles of the abdominal wall.