The zones of the meniscus are primarily determined by which factor?

The meniscus, a crucial structure in the knee joint, is divided into different zones that are largely influenced by the blood supply it receives. The outer region of the meniscus, known as the red zone, receives a good blood supply, which facilitates healing when damage occurs. This region is more vascularized compared to the inner zone, or the white zone, which has limited blood flow. The significance of blood supply cannot be overstated; it not only promotes healing but also impacts the regenerative capabilities of the meniscus. Since the meniscus has limited intrinsic healing potential, understanding its vascular zones is vital for treatment decisions in cases of meniscal tears or injuries, guiding clinicians in their approach to repair and rehabilitation.