Worthless Human Body Parts - Had a purpose..??

1.Tailbone

The tailbone or coccyx is what you have left of the tail your evolutionary ancestors used to help them balance when they lived in the trees. You had a tail once, in fact — we all did. During early development in the womb, the human embryo actually has a tail. The body eventually absorbs it, although in rare cases; babies can be born with the tail still intact.

2.Goosebumps

If you've ever wondered why you get goosebumps when you're chilly even though they don't seem to make you any warmer, here's your answer: they're a reflex left over from when your ancestors had fur. Goosebumps are a result of arrector pili, muscles that contract involuntarily when you're cold or experiencing heightened emotions. Those contractions make your body hair stand up straight, and if that body hair was thicker and longer, it could help insulate you or make you look larger to an adversary.

3.Wisdom Teeth

Your first set of molars ;usually come in when you're about six years old, your second set when you're about 12, and your third molars — what people call wisdom teeth — when you reach your twenties. Wisdom teeth can come in in a lot of strange ways: sometimes they come in just fine, other times they get "impacted" or blocked from coming in all the way, and some never come in at all.

Because there are people who have wisdom teeth that work just fine, this one is technically a gray area when it comes to vestigial structures. But those extra molars were definitely more useful for our primate ancestors than they are for us today, since we can receive all our necessary nutrition through Slurpees and Go-gurt.

4.Appendix

The appendix is usually the first trait people point to when they talk about vestigial structures, but we have news for those people: scientists think your appendix probably still has a function.It's evolved many, many times in different mammal species, which suggests it's pretty useful. Because its evolution usually comes with immunity-boosting lymph tissue and people who have their appendix removed are  more likely to suffer from bacterial infections, all signs point to the likelihood that the appendix does something for your immune system. Just because we don't know why something exists doesn't mean it's useless!