Anatomy

Sacrum

Five fused VERTEBRAE forming a triangle-shaped structure at the back of the PELVIS. It articulates superiorly with the LUMBAR VERTEBRAE, inferiorly with the COCCYX, and anteriorly with the ILIUM of the PELVIS. The sacrum strengthens and stabilizes the PELVIS.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Five fused VERTEBRAE forming a triangle-shaped structure at the back of the PELVIS. It articulates superiorly with the LUMBAR VERTEBRAE, inferiorly with the COCCYX, and anteriorly with the ILIUM of the PELVIS. The sacrum strengthens and stabilizes the PELVIS.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

6 entry terms
  • Sacra
  • Sacrums
  • Sacral Vertebra
  • Sacral Vertebrae
  • Vertebra, Sacral
  • Vertebrae, Sacral

MeSH Record

Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

Indexing Annotation

do not confuse with LUMBOSACRAL REGION or SACROCOCCYGEAL REGION

MeSH Hierarchy

Tree Number

  1. A02w.835w.232w.834.717w

MeSH Record

NLM Classification

WE 750

AMA Style

References

  1. National Library of Medicine. Sacrum. Medical Subject Headings (MeSH). 2026. Unique ID D012447. http://id.nlm.nih.gov/mesh/2026/D012447
  2. Sacrum. In: Wikipedia. https://en.wikipedia.org/wiki/Sacrum
  3. Sacrum. In: Wikidata. https://www.wikidata.org/wiki/Q233316