Same basic structure: In both men and women, the lowerextremities attach to the axial skeleton through the similar pelvic girdle (two fused bones, pelvic and Sacrum), which articulate with, or attache to the right and left femur at the antebellum socket. The main difference between the sexes is the angle of the pubic arch, (Male<90, Female>90) which in women supports birth and reproduction.