Backbones are made up of many or two bones?

The backbone, or vertebral column, is made up of many individual bones called vertebrae, which are stacked on top of one another. In humans, there are typically 33 vertebrae, divided into different regions: cervical, thoracic, lumbar, sacral, and coccygeal. These vertebrae work together to provide support, flexibility, and protect the spinal cord. So, the backbone is composed of many bones, not just two.