Some human body parts serve no purpose despite having a specific function among our ancestors.
The appendix, for example, is not an essential body part (although some research suggests it may act as a storage for good bacteria). In some cases, the appendix gets inflamed or ruptures, which requires surgical removal of the organ.
Several other parts of the body used to be important for human survival, but they have since become useless. Some of them can be removed, and their absence does not lower people's quality of life. Dorsa Amir an evolutionary anthropologist at Boston College, learns more about what she calls "evolutionary leftovers."
Take a look at nine body parts that have remained in the human body despite having no function for millions of years.