Final answer:
The difference between male and female thigh bones lies in how they connect to the pelvis, which differs between sexes. The female pelvis is structured to facilitate childbirth, making it wider and shallower, while the male pelvis is narrower and adapted for supporting more weight.
Step-by-step explanation:
The main differences between male and female thigh bones, or femurs, are related to the overall differences in the pelvis structure due to their different functions in the body. While the thigh bones themselves may not have pronounced sexual dimorphism, they articulate with the pelvis, which does exhibit significant differences between males and females .In females, the pelvis bones are generally lighter and thinner, with a wider angle between the pubic bones to facilitate childbirth. This means that the thigh bones are set more widely apart. The female pelvic inlet is round or oval, and the lesser pelvic cavity is wider and more shallow than in males. Additionally, the subpubic angle in females is greater than 80 degrees, contributing to the wider pelvic structure. Conversely, in males, the pelvis bones are thicker and heavier, adapted for supporting a heavier build and stronger muscles. The male pelvic inlet has a heart shape, and the lesser pelvic cavity is narrower and deeper. The subpubic angle is typically less than 70 degrees.