part of part of Homo sapiens fused sacrum bone foramen sacral canal of sacrum 2026-03-19T00:00:00Z A bone foramen forming the continuation of the vertebral canal within the sacrum, running the full length of the bone and enclosing the cauda equina, the filum terminale, and the meningeal coverings of the spinal cord, communicating inferiorly with the exterior through the sacral hiatus. David Osumi-Sutherland