Final answer:
Osteoblasts gather on the trabeculae to form osteoid tissue, an uncalcified organic part of the bone matrix that eventually calcifies and traps osteoblasts, which then become osteocytes.
Step-by-step explanation:
Osteoblasts gather on the trabeculae to form osteoid tissue (uncalcified bone). Osteoid is the unmineralized bone matrix secreted by osteoblasts around the capillaries which results in a trabecular matrix.
This osteoid then calcifies as mineral salts are deposited on it, entrapping the osteoblasts within, which then become osteocytes. Osteogenic cells in the surrounding connective tissue differentiate into new osteoblasts, continuing the cycle of bone formation and remodeling.