An adult human backbone has 24 vertebral bones, referred to as the presacral vertebrae. At birth, the human spine consists of 33 individual bones. Some portions interact and fuse when an individual reaches adulthood. An adult spine is divided into three curvatures: cervical, thoracic and lumbar. The spine, also known as the vertebral column or spinal column, is a column of 26 bones in an adult body — 24 separate vertebrae interspaced with cartilage, and then additionally the sacrum and coccyx.
There are seven cervical, twelve thoracic, five lumbar, five fused sacral, and four fused coccygeal bones in an adult. So that makes a total of 33 bones. Oct 10, · Vertebral Column (26 bones) The vertebral column, (spine or spinal column), extends from the base of the skull to the pelvis, forming the vertebral axis of the axial skeleton. It is made up of irregular bones called vertebra which are separated from one another by fibrocartilage called intervertebral discs.