Which statement correctly describes bone structure?

The correct statement describes the Haversian system, which is a fundamental structural unit of compact bone. The Haversian canals are central channels that run through the bone, containing blood vessels and nerves. This arrangement allows the bone to maintain its metabolic needs and communicate with surrounding structures. The presence of Haversian canals organizes the bone tissue in a way that supports both strength and the transport of nutrients.

This organization is crucial for the functionality of bone, as it ensures that each unit remains alive and capable of growth and repair. While other components of bone, such as bone trabeculae (not tubulae) in spongy bone, are organized differently, the Haversian canals are specifically characteristic of compact bone. The other options do not accurately describe bone structure in the context of the Haversian system. For instance, bone is primarily composed of mineralized matrix and collagen fibers, rather than cartilage. Additionally, bone tissue is vascularized, meaning it has a blood supply, which contradicts the description of being non-vascular in nature.