Most useless thing in human body is appendix. Yes, it’s like a small rubbery unflated hanging balloon like structure which is just a rudimentary structure in human body. It generally hosts microorganisms like bacteria etc. which are generally safe for humans. read more
Vomeronasal organ, or Jacobson’s organ, is found on the olfactory system of amphibians, reptiles, and mammals. Described as chemoreceptors, this non-functioning specialized sensory system in the nose is used to detect chemicals, in the case of humans, pheromones. read more