( ( ( ( But ( ( your skeleton ) ( ( is n't ) ( ( just ( a ( ( hard ( , lifeless ) ) structure ) ) ) ( that ( keeps ( you up-right ) ) ) ) ) ) ) -- ) ( it ( is ( ( ( ( living , ) ( growing ( tissue ( that ( ( ( ( ( supports muscles ) , ) ( protects ( vital organs ) ) ) and ) ( provides ( ( a reservoir ) ( for calcium ) ) ) ) ) ) ) ) , ) ( ( a mineral ) ( that ( 's ( essential ( for ( various ( vital functions ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (CC But) (NP (PRP$ your) (NN skeleton)) (VP (VBZ is) (RB n't) (NP (NP (RB just) (DT a) (ADJP (JJ hard) (, ,) (JJ lifeless)) (NN structure)) (SBAR (WHNP (WDT that)) (S (VP (VBZ keeps) (S (NP (PRP you)) (ADJP (JJ up-right))))))))) (: --) (S (NP (PRP it)) (VP (VBZ is) (VP (VP (VBG living)) (, ,) (VP (VBG growing) (NP (NP (NN tissue)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ supports) (NP (NNS muscles))) (, ,) (VP (VBZ protects) (NP (JJ vital) (NNS organs))) (CC and) (VP (VBZ provides) (NP (NP (DT a) (NN reservoir)) (PP (IN for) (NP (NN calcium)))))))))) (, ,) (NP (NP (DT a) (NN mineral)) (SBAR (WHNP (WDT that)) (S (VP (VBZ 's) (ADJP (JJ essential) (PP (IN for) (NP (JJ various) (JJ vital) (NNS functions))))))))))) (. .)))
But your skeleton isn't just a hard, lifeless structure that keeps you up-right--it is living, growing tissue that supports muscles, protects vital organs and provides a reservoir for calcium, a mineral that's essential for various vital functions.
(ROOT (S (NP (DT The) (NN skeleton)) (VP (VP (VBZ supports) (NP (DT the) (NN body))) (, ,) (VP (VBZ protects) (NP (JJ internal) (NNS organs))) (, ,) (VP (VBZ produces) (NP (NN blood) (NNS cells))) (, ,) (CC and) (VP (VBZ maintains) (NP (NN mineral) (NNS homeostasis)))) (. .)))