Useless parts of a human's body

i was skimming through the Live Science website when i came accross an interesting article..
it's about the top 10 useless limbs or vestigial organs of any living being..
then out of this ten... four came from us human...

the first one... the human tailbone
according to the article, tailbones in any animals are meant for balancing.. but for human, the tailbone is just to small to do any balancing....i was said that this tailbone is a vestigial limb from our ancestors. as they started to walk straight, the tailbone shrinks until it reaches the size like wat we have.

the second useless part...wisdom teeth
wisdom teeth is said to be useless and only brings pain. wisdom teeth is considered to be vestigial because in the past, our ancestors have bigger jaws so it fits more teeth.. also dental hygiene was not important in the past... so having extra teeth maybe useful to replace the rotten ones. but now, we brush teeth more than twice a day and visit the dentist a few times in a year, wisdom teeth became useless.

the third useless part... male breast tissues and nipples.
men do not need to go through breast feeding and men's nipples do not cause much sexual stimulation...so according to the researchers, they are useless. however, men have breast tissues because during the early stage, a foetus is sexless. only in the later stage, then the sexual organs developed determining whether it's a girl or boy. despite the fact that male breast tissues are pretty useless, they may be harmful because both male and female may develop breast cancer.

last but not least... the appendix
appendix is useful for herbivors for digestion... but for humans, they are just useless.. according to a paleontologist, appendix do play a major role..... as a financial support for surgical professions. other than that, it's just useless... also, appendix maybe dangerous to as it has brought a lot of deaths

after reading these, i realised that it's rather true...