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The term vestigial organ is used to describe tissues that are typically in a degenerate, atrophied, or rudimentary condition, and the appendix has long been characterised as such a tissue. The work of Dr’s William Parker and Randall Bollinger have raised a number of interesting observations that indicate this tissue should be given an updated and relevant title.

To coin a phrase it is a ‘reservoir of dogs bacteria’, providing a safe repository or bank of bacterial species able to re-colonise in the event of a traumatic disruption of the microbial mix, such as that experienced after diahorrea or antibiotic use.[1]

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