Final answer:
The vertebral column, comprising 26 bones, provides support, enables movement, and protects the spinal cord. Rachio+dynia and rachi+algia refer to painful conditions of the spine or back.
Step-by-step explanation:
The vertebral column is a crucial part of the human skeletal system, providing structural support and protection for the spinal cord. Rachio+dynia and rachi+algia are terms that describe conditions of painful spine or back. Vertebral column, often referred to as the spine or backbone, consists of 26 bones in adults: 24 vertebrae, the sacrum, and the coccyx. These vertebrae are categorized into cervical, thoracic, and lumbar regions, with the sacral and coccygeal vertebrae being fused.
The spinal column is responsible not only for supporting the head but also for serving as an attachment point for ribs and muscles of the back and neck, thus maintaining the body’s upright posture. The spinal cord is safely enclosed within the vertebral foramen, a passage formed by the alignment of each vertebra’s central holes.