( Basically ( , ( ( the ( vertebrate skeleton ) ) ( ( is ( ( internal ( -LRB- ( ( an endoskeleton ) -RRB- ) ) ) ( while ( ( the ( arthropod skeleton ) ) ( ( is external ) ( -LRB- ( ( an exoskeleton ) -RRB- ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Basically)) (, ,) (NP (DT the) (JJ vertebrate) (NN skeleton)) (VP (VBZ is) (ADJP (JJ internal) (PRN (-LRB- -LRB-) (NP (DT an) (NN endoskeleton)) (-RRB- -RRB-)) (SBAR (IN while) (S (NP (DT the) (JJ arthropod) (NN skeleton)) (VP (VBZ is) (ADJP (JJ external)) (PRN (-LRB- -LRB-) (NP (DT an) (NN exoskeleton)) (-RRB- -RRB-))))))) (. .)))
Basically, the vertebrate skeleton is internal (an endoskeleton) while the arthropod skeleton is external (an exoskeleton).
(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)))))) (. .)))