Final answer:
The pelvic outlet is the inferior opening of the lesser pelvis, formed by the pubic symphysis, ischiopubic ramus, ischial tuberosity, sacrotuberous ligament, and the coccyx.
Step-by-step explanation:
The structures that form the pelvic outlet are crucial in defining the inferior limit of the lesser pelvic cavity. The pelvic outlet is framed by several bony landmarks. These include the inferior margin of the pubic symphysis anteriorly, the ischiopubic ramus, ischial tuberosity, sacrotuberous ligament, and the coccyx posteriorly. This configuration contributes to the overall pelvic outlet shape, which varies between genders; the female pelvis typically has a wider outlet to facilitate childbirth, characterized by a larger subpubic angle and broader pelvic dimensions overall.