Palscience

In Charles Darwin’s On the Origin of Species (1859) and his next publication, The Descent of Man (1871), he referred to several vestigial organs in human anatomy that were left over because of evolution. He argued that these Vestigial are a clear evidence of human evolution. He also said that these useless parts were necessarily for human or animals survival. Human/Animals used to use them for eating, walking, listening, but over time that function became either diminished or nonexistent.

It will be probably more clear for you if I defined Vestigial orgin for you. This is the best definition from Oxford dictionary.

The Oxford English Dictionary (OED) defines vestigial organs as organs or structures remaining or surviving in a degenerate, atrophied, or imperfect condition or form. This is the accepted biological definition used in the theory of evolution.

In the never-ending search for scientific truth, hypotheses are proposed, evidence is found, and theories are formulated to describe and explain what is being observed in the world around us. The following are ten observations of vestigial organs whose presence have helped to flesh out the structure of the family tree that includes every living creature on our planet.

 As an example of Vestigial organs in the human body is the Vermiform Appendix (Look Up At The Picture), over time its no longer retain its original function.