====== Sacrum ======

Sacrum is also called as vertebra Magnum.

  * SACRUM [SACRAL VERTEBRAE I - V]
    * Base
      * Promontory
      * Ala; wing
      * Superior articular process
    * Lateral part
      * Auricular surface
      * Sacral tuberosity
    * Pelvic surface
      * Transverse ridges
      * Intervertebral foramina
      * Anterior sacral foramina
    * Dorsal surface
      * Median sacral crest
      * Posterior sacral foramina
      * Intermediate sacral crest
      * Lateral sacral crest
      * Sacral cornu; sacral horn
      * Sacral canal
        * Sacral hiatus
    * Apex



===== External features =====

Sacrum is triangular in shape hence it has base or upper surface , apex or lower end and 4 surfaces.

**Surfaces**

Pelvic surface 
Dorsal surface 
Right lateral surface 
Left lateral surface.


**Base**

   
   
|  577  |   |  OS SACRUM [VERTEBRAE SACRALES I - V]   |  SACRUM [SACRAL VERTEBRAE I - V]  |   |
|  578  |   |  Basis ossis sacri                      |  Base                             |   |
|  579  |   |  Promontorium                           |  Promontory                       |   |
|  580  |   |  Ala ossis sacri                        |  Ala; wing                        |   |
|  581  |   |  Processus articularis superior         |  Superior articular process       |   |
|  582  |   |  Pars lateralis                         |  Lateral part                     |   |
|  583  |   |  Facies auricularis                     |  Auricular surface                |   |
|  584  |   |  Tuberositas ossis sacri                |  Sacral tuberosity                |   |
|  585  |   |  Facies pelvica                         |  Pelvic surface                   |   |
|  586  |   |  Lineae transversae                     |  Transverse ridges                |   |
|  587  |   |  Foramina intervertebralia              |  Intervertebral foramina          |   |
|  588  |   |  Foramina sacralia anteriora            |  Anterior sacral foramina         |   |
|  589  |   |  Facies dorsalis                        |  Dorsal surface                   |   |
|  590  |   |  Crista sacralis mediana                |  Median sacral crest              |   |
|  591  |   |  Foramina sacralia posteriora           |  Posterior sacral foramina        |   |
|  592  |   |  Crista sacralis medialis               |  Intermediate sacral crest        |   |
|  593  |   |  Crista sacralis lateralis              |  Lateral sacral crest             |   |
|  594  |   |  Cornu sacrale                          |  Sacral cornu; sacral horn        |   |
|  595  |   |  Canalis sacralis                       |  Sacral canal                     |   |
|  596  |   |  Hiatus sacralis                        |  Sacral hiatus                    |   |
|  597  |   |  Apex ossis sacri; apex ossis sacralis  |  Apex                             |   |


|	598	|		|	OS COCCYGIS; COCCYX [VERTEBRAE COCCYGEAE I - IV]	|	COCCYX [COCCYGEAL VERTEBRAE I - IV]	|		|
|	599	|		|	Cornu coccygeum	|	Coccygeal cornu	|		|
|	600	|		|	SKELETON THORACIS	|	THORACIC SKELETON	|		|
|	601	|		|	COSTAE [I-XII]	|	RIBS [I-XII]	|		|
|	602	|		|	Costae verae [I-VII]	|	True ribs [I-VII]	|		|
|	603	|		|	Costae spuriae [VIII-XII]	|	False ribs [VIII-XII]	|		|
|	604	|		|	Costae fluctuantes [XI-XII]	|	Floating ribs [XI-XII]	|		|
|	605	|		|	Cartilago costalis	|	Costal cartilage	|