( ( ( ( endoskeleton ( An ( internal ( supporting skeleton ) ) ) ) ( with muscles ) ) ( on ( ( ( ( the outside ) ; ) ( in vertebrates ) ) , ) ) ) ( ( consists ( of ( ( ( ( ( ( ( ( the skull ) , ) ( spinal column ) ) , ) ribs ) , ) and ) appendages ) ) ) . ) )
(ROOT (S (S (VP (VBN endoskeleton) (NP (DT An) (JJ internal) (JJ supporting) (NN skeleton)) (PP (IN with) (NP (NNS muscles))) (PP (IN on) (NP (NP (DT the) (NN outside)) (: ;) (PP (IN in) (NP (NNS vertebrates))) (, ,))))) (VP (VBZ consists) (PP (IN of) (NP (NP (DT the) (NN skull)) (, ,) (NP (JJ spinal) (NN column)) (, ,) (NP (NNS ribs)) (, ,) (CC and) (NP (NNS appendages))))) (. .)))
endoskeleton  An internal supporting skeleton with muscles on the outside; in vertebrates, consists of the skull, spinal column, ribs, and appendages.
(ROOT (S (NP (DT The) (JJ vertebrate) (NN endoskeleton)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (VP (VBN called) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (NP (JJ internal) (NN skeleton)))))) (. .)))