Final answer:
The levator ani is made up of the pubococcygeus and iliococcygeus muscles, supporting the pelvic floor and aiding in various functions related to pelvic organ support and continence.
Step-by-step explanation:
The muscles grouped together that are called levator ani are the pubococcygeus and the iliococcygeus. These two muscles are integral to the structure of the pelvic floor and are crucial for supporting pelvic viscera, aiding in defecation, assisting childbirth, and maintaining continence by contributing to the function of urethral and an_al sphincters. They form part of the pelvic diaphragm and work together to resist intra-abdominal pressure.