Final answer:
Intramembranous ossification is the process by which trabeculae of bone surrounding the perforating canals replace embryonic connective tissue in developing flat bones.
Step-by-step explanation:
Intramembranous ossification is the process by which compact and spongy bone develop directly from sheets of mesenchymal connective tissue. During the development of flat bones, the trabeculae of bone surrounding the perforating canals replace the embryonic connective tissue. These canals, also known as Volkmann's canals, branch off from the central canal and contain blood vessels and nerves that extend to the periosteum and endosteum.