An interesting part of human evolution is the vestigial structures and organs that we still have. For hundreds of years people have been wondering what functions and uses certain organs have in the body. These structures are evidence and traces of human evolution and the theory of natural selection. That is, they prove that at one time there was a specific use for them in another environment or another species, but now they have become useless in today’s world and in the human body. A few examples of vestigial structures are the appendix, coccyx, and wisdom teeth. The appendix is used in animals to store harmful bacteria during digestion. The coccyx is the last remnant of a tail. In most mammals, tails are used for balance. Although it is still developed at the embryo stage, there is no need for it in an adult/child body. Lastly, wisdom teeth really have no advantage or need in modern times. Earlier on, jaws were larger and the wisdom teeth were needed to grind up plant food. But now they serve no purpose. All of these organs and structures are still in the human body, but are considered useless. This simply illustrates the evolution of the human body.
http://txtwriter.com/Backgrounders/Evolution/EVpage12.html
