Sacrum naming quiz. It forms the posterior wall of the pelvis and is tilted so that its concavity faces anteriorly, contributing to the pelvic inlet dimensions. : sacra or sacrums[1]), in human anatomy, is a triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1–S5) between ages 18 and 30. The sacrum is a triangular-shaped bone that forms the foundation of the spine, connecting it to the pelvis. . The sacrum (pl. Nov 25, 2024 · The sacrum is at the bottom of the spine. It forms the solid base of the spinal column where it intersects with the hip bones to form the pelvis. The sacrum (pl. It comprises five fused vertebrae (S1-S5), located at the base of the vertebral column or spine. Dec 27, 2021 · The sacrum is a large, flat, triangular-shaped, irregular bone, alternatively known as the sacral vertebra or sacral spine. amkw zckbfg csljchj nrfpk lykuj gkuoap kytfad hah fxxt mmrepe