Vestigial Structures

Drawing of the large intestine

This is part of the large intestine. At the end of the large intestine is the appendix, which is a vestigial structure. A vestigial  structure is an organ that was great use to an organism's ancestors, but are now useless to the present organism. The appendix is a great and most commonly known vestigial structure because our ancestors used to use the appendix to help digest plants, but is now no use to us because of evolution.

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