In some texts, regarding the vestigiality of some organs in external genitalia, the nipples in men are cited as the vestigial organs of breasts in women, and the clitoris the vestigial organ of the homologous, as they are present in humans ( and primates ) of both sexes, not during the passage of animal development.
32.
The significance of Struthers'ligament, as Darwin and Struthers understood, is that the vestigial organ has no function in humans, but is inherited from a structure, the supra-condyloid foramen, which certainly had a function in other mammals including marsupials and homologous with the foramen in other mammals, and that therefore humans and other mammals had a common ancestor.
