Vestigial means a body part or organ that is remaining in a form which is small or imperfectly developed and so it's not able to function.
Also being or having the form of a vestige.
A pseudo tail also known as Pseudotails are varied lesions that have in common a lumbosacral protrusion and a superficial resemblance to persistent vestigial tails.
The most frequent cause of a pseudotail in a series of ten cases obtained from the literature was an anomalous prolongation of the coccygeal vertebrae.
True tails contain muscle, adipose tissue, and connective tissue whereas pseudotails contain bone, cartilage, and remnants of notochord.
A “vestigial tail” describes a remnant of a structure found in embryonic life or in ancestral forms.
During the 5th to 6th week of intrauterine life, the human embryo has a tail with 10–12 vertebrae.
By 8 weeks, the human tail disappears.
There are several human atavisms that reflect our common genetic heritage with other mammals.
One of the most striking is the existence of the rare 'true human tail'.
It is a rare event with fewer than 40 cases reported in the literature.
There are several human atavisms that reflect our common genetic heritage with other mammals.
One of the most striking is the existence of the rare 'true human tail'.
It is a rare event with fewer than 40 cases reported in the literature.