Real human vertabrae column. There 23 prescaral (mobile) vertebrae on this column with sacrum.
While 24 is the most common number, variations can occur in approximately 10% of the population, where an individual may have 23 or 25 presacral vertebrae due to conditions like sacralization (L5 fuses with the sacrum) or lumbarization (S1 fails to fuse with the rest of the sacrum).
