Which of the following components is NOT typically found in trabeculae?

Trabeculae are the structural units found in spongy bone, contributing to its lightweight and porous nature. They are composed of a network of bone tissue arranged in a lattice-like structure.

Lacunae are small cavities within the bone matrix that house osteocytes, the cells responsible for maintaining bone tissue. Lamellae refer to the thin layers of bone matrix that form the structure of trabeculae, providing strength and support. Water is also present within the porous spaces of trabecular bone, contributing to its hydration and facilitating nutrient exchange.

Fibroblasts, on the other hand, are cells typically associated with connective tissues, particularly in the production of collagen and other extracellular matrix components. They are not a normal component of trabecular bone, as trabecular bone is primarily comprised of osteoblasts, osteocytes, and bone matrix elements, rather than fibroblasts. This distinction makes the presence of fibroblasts in trabeculae atypical and identifies it correctly as the option that does not belong.