No one is certain what the function of the human appendix is. But, one thing we do know is that we can live without it, without noticeable consequences. Therefore, the human appendix is an example of a

Answer: Vestigial parts

Explanation:

Vestigial parts are body parts seen as useful in some species, while of no use in others.

The human appendix is an example of vestigial parts, because its absence is of no consequence; whereas it plays the role of caecum in herbivores like goat.

Other vestigial parts in humans include the rudimentary mammary glands in man, whereas well developed and functional in woman.