Sacrum - Anatomy, Location, Functions, & Labeled Diagram
https://www.theskeletalsystem.net/spine-vertebral-column/sacrum.html
WEBDec 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 base of the vertebral column or spine. The bone links the spine with the hip, thus helping in hip stability.
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