Multiple choice Vertebrae which are irregular bones are ____ in number in human beings. 26 2 22 12 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The human vertebral column consists of 33 vertebrae at birth, but these fuse into 26 distinct bones in adulthood (7 cervical, 12 thoracic, 5 lumbar, 1 sacrum, and 1 coccyx).