Spinal discs receive nutrients through diffusion. Spinal discs are avascular structures, meaning they do not have their own blood supply. Instead, they rely on diffusion to receive nutrients and oxygen from the surrounding tissues.

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. In the case of spinal discs, nutrients and oxygen from nearby blood vessels diffuse into the disc, where they are absorbed by the cells that make up the disc.

The process of diffusion is facilitated by the movement and pressure changes that occur within the spine during everyday activities such as walking, sitting, and bending. This movement creates a pumping effect that helps to circulate fluids within the discs, facilitating the diffusion of nutrients and waste products.

Maintaining good spinal health through practices such as chiropractic, regular exercise, proper posture, and adequate hydration can help to promote the diffusion of nutrients into the spinal discs, supporting their health and function.