👉 Breastbone is a type of bone that develops from the end of a vertebral column, or long bone. It is composed of two sets of cells: the trabeculae and the trabecular meshwork. The trabecular meshwork consists of thin, round cells called osteoblasts that form in the trabeculae. These cells grow into larger, more compact cells known as osteoclasts, which then break down the trabecular meshwork to release