2. SACRUM
• The sacrum is a shield-shaped bony structure
that is located at the base of the lumbar
vertebrae and that is connected to the pelvis
• The sacrum is a single bone comprised of five
separate vertebrae that fuse during
adulthood. It forms the foundation of the
lower back and the pelvis.
3. • The sacrum is a concave sphenoid bone that sits
at the bottom of the spinal column. It looks like
an inverted triangle: the widest part (base) is at
the top, and the pointy end (apex) is at the
bottom.
• The sides of the sacrum connect to the right and
left hip (iliac) bones. The apex is connected to the
tailbone (coccyx). The base is connected to the
largest and lowest of the lumbar vertebrae, L5.
•
4. • strong foundation for the formation of the pelvis.
• The human pelvis also needs to be wide enough
to provide leverage for motion and balance, as
well as to facilitate childbirth.
• The sacrum creates an anchor point where the
spinal column can attach to the pelvis and
provide stability for the body's core
• acts as a platform for the spinal column to rest on
when sitting.
5.
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8.
9. • Median portion is sacral canal
• Transverse process fused to make LATERAL
MASSES posteriorly and costal elements
anteriorly.
