Sacrum.
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[[Basis ossis sacri]] | 
[[Promontorium]] | 
[[Ala ossis sacri]] | 
[[Processus articularis superior]] | 
[[Pars lateralis]] | 
[[Facies auricularis]] | 
[[Tuberositas ossis sacri]] | 
[[Facies pelvica]] | 
[[Lineae transversae]] | 
[[Foramina intervertebralia]] | 
[[Foramina sacralia anteriora]] | 
[[Facies dorsalis]] | 
[[Crista sacralis mediana]] | 
[[Foramina sacralia posteriora]] | 
[[Crista sacralis medialis]] | 
[[Crista sacralis lateralis]] | 
[[Cornu sacrale]] | 
[[Canalis sacralis]] | 
[[Hiatus sacralis]] | 
[[Apex ossis sacri (apex ossis sacralis)]]