Final answer:
The subpubic angle is larger in females (>80 degrees) compared to males (<70 degrees), reflecting the adaptation of the female pelvis for childbirth. Females also exhibit a broader pelvis, rounder pelvic brim, and wider, shallower lesser pelvic cavity. These characteristics distinguish female from male pelvises and aid in sex determination.
Step-by-step explanation:
The subpubic angle is an anatomic characteristically found between the left and the right ischiopubic rami. This angle is significantly larger in females than in males, where it measures greater than 80 degrees in females and less than 70 degrees in males. The difference in the subpubic angle size relates to the functional adaptation of the female pelvis for childbirth, making it broader and more conducive to the birthing process. In the female pelvis, other notable differences include a broader, round pelvic brim, a wider and more shallow lesser pelvic cavity, and more spaced apart ischial tuberosities compared to the male pelvis. The pelvis is composed of the two hip bones, but it does not include the sacrum or coccyx. Moreover, the ischial spine and the sciatic notch on the male hip bone are narrower and deeper than those seen in females, reflecting differences in anatomy that help in the determination of sex from skeletal remains.