The sacrum (pl.: 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.

Oct 23, 2025 · The sacrum is a single bone made from five fused vertebrae that connects the spine to the pelvis. It supports the body's core, especially when sitting or standing, and helps …

Dec 27, 2021 · The sacrum is a large, flat, triangular-shaped, irregular bone, alternatively known as the sacral vertebra or sacral spine. It comprises five fused vertebrae (S1-S5), located at the …

Nov 6, 2025 · The sacrum is a large, triangular bone at the terminal end of the vertebral column. It forms the posterior wall of the pelvis and plays a key role in weight transmission from the axial …

The sacrum is a triangular-shaped bone that forms the foundation of the spine, connecting it to the pelvis. The sacral vertebrae, sacral hiatus, and sacral foramina are essential anatomical …

As part of the pelvic girdle, the sacrum forms the back wall of the pelvis and also forms joints at the hip bone called the sacroiliac joints. The sacrum contains a series of four openings on …

Nov 11, 2025 · It forms the solid base of the spinal column where it intersects with the hip bones to form the pelvis. The sacrum is a very strong bone that supports the weight of the upper …

Sep 12, 2025 · The sacrum is a large, triangular bone located at the base of the vertebral column between the lumbar spine and coccyx. It is formed by the fusion of five sacral vertebrae …

Jun 3, 2025 · The sacrum is a triangular bone formed by the fusion of five sacral vertebrae, located between the lumbar spine and the coccyx. It articulates with the pelvis at the sacroiliac …

Oct 30, 2023 · Bony structures and ligaments of the sacrum and coccyx. The sacrum is an irregularly shaped bone, made up of a group of five fused vertebrae in the area of what is …