<prompt> The rectus sheath contains all of the following exceptPyramidalis muscleGenitofemoral nerveInferior epigastric vesselsSuperior epigastric vessels  <response>: The rectus sheath is formed by the aponeuroses of the transverse abdominal and the external and internal oblique muscles. It contains the rectus abdominis and pyramidalis muscles. It can be divided into anterior and posterior laminae. 