body parts that we dont need anymore !

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just a useless few facts that you may not be aware of heres a few actual body parts that we all have but we dont use since we have evolved. Plica semilunaris You may not know it, but you have a third eyelid. Pull open the two more noticeable eyelids and take a look—it's located right in the corner by the tear duct. This small third eyelid is left over from what's known as a "nictitating membrane," which is still present in full form in some animals including chickens, lizards and sharks but not in us humans. Adenoids Adenoids trap bacteria, but they're also prone to swelling and infection. Just ask any seven-year-old. Luckily, our adenoids shrink with age and are often removed, along with your tonsils. Arrector pili When we were hairier as an ape etc etc, the arrector pili made the hairs stand on end when we needed to appear bigger and scarier. Now, it just gives us goose bumps ever wondered why your hairs stand up when your scared or excited well now you know lol. Wisdom teeth Back in the day, when we ate mammoth meat off the bone and didn't floss afterward, our teeth tended to fall out. Therefore, when those reserve molars, aka "wisdom teeth," came in, they were welcomed. Nowadays, fluoride and dental plans have just made them a huge pain. Appendix Darwin claimed the appendix was useful for digestion during our early plant-eating years; it's dwindled down to little since we started eating more digestible foods.