The vomeronasal organ functions as olfactory organ in most of the reptiles and amphibians. In some cases, structures once identified as vestigial simply had an unrecognized function.
Although structures called vestigial often appear functionless, a vestigial structure may retain lesser functions or develop minor new ones. In the context of human evolution, human vestigiality involves those traits (such as organs or behaviors) occurring in humans that have lost all or most of their original function through evolution. Some are repeated in this list of ten vestigial structures you didn't know you had. This list of vestigial structures is inclusive of the entire animal kingdom.
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