Answer
Contraction of the rectus abdominis aids in urination.
Work Step by Step
The rectus abdominis is long vertical muscle that extends from the pubis symphysis and pubic crest to the xiphoid process and ribs 5-7. Contraction of the rectus abdominis flexes the vertebral column upon the pelvis. Urination, defecation, childbirth, and forced exhalation are some physiological functions that are facilitated by contraction of the rectus abdominis.
