embryonic post-anal tailGo to external page http://purl.obolibrary.org/obo/UBERON_0007144
An embryonic structure that will either develop into a post-anal tail or recede into a vestigial remnant of the tail.
By the fourth week a clear tail is seen in the human embryo. It recedes after a few weeks and these tissues form what is commonly known as the tailbone (coccyx).
tail of embryo