Which feature provides the clearest distinction between male and female skeletons?

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The pelvis is the feature that provides the clearest distinction between male and female skeletons due to its role in childbirth and differences in overall anatomy. In females, the pelvis is typically wider and has a larger pelvic inlet and outlet to accommodate for the passage of a baby during delivery. This is often reflected in a broader subpubic angle, which is the angle formed at the pubic symphysis, and a generally more rounded pelvic shape.

The male pelvis, conversely, is generally narrower with a more triangular shape, a smaller pelvic inlet, and a more pronounced sacral curvature. These characteristics are adaptations tied to the differing functional requirements: males tend to have a pelvis designed for bipedal locomotion and strength, while females have adaptations that facilitate childbirth.

While other skeletal structures, such as the skull or sternum, do show some sexual dimorphism, they do not present the marked differences observed in the pelvis. For instance, skull features may vary, but these differences are often more subtle and can overlap between sexes. Hence, the pelvis stands out as the most definitive skeletal structure for distinguishing between males and females.

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