<P> The sacrum ( / ˈsækrəm / or / ˈseɪkrəm / ; plural : sacra or sacrums ; ) in human anatomy is a large , triangular bone at the base of the spine , that forms by the fusing of sacral vertebrae S1 -- S5 between 18 and 30 years of age . </P>
<P> The sacrum ( / ˈsækrəm / or / ˈseɪkrəm / ; plural : sacra or sacrums ; ) in human anatomy is a large , triangular bone at the base of the spine , that forms by the fusing of sacral vertebrae S1 -- S5 between 18 and 30 years of age . </P>
where is the sacral located on the body
where is the sacral located on the body
the base of the spine
the base of the spine