The primary function of the spine is to provide structural support and protect the spinal cord. It serves as the backbone of the human skeleton, allowing for upright posture and enabling mobility. The spine consists of vertebrae stacked on top of each other, creating a flexible and resilient column. It also serves as an attachment point for ribs, which protect the thoracic organs, and provides support for the head. Additionally, the spine plays a crucial role in absorbing shock and distributing weight, making it vital for overall physical stability and coordinated movement.