( Reptiles ( ( ( ( are ( ( ( ( ectothermic or ) heterothermic ) vertebrates ) ( -LRB- ( ( commonly ( referred ( to ( as cold-blooded ) ) ) ) -RRB- ) ) ) ) , ) ( meaning ( they ( ( do not ) ( have ( an ( automatic ( internal ( body ( temperature ( control system ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Reptiles)) (VP (VBP are) (NP (NP (ADJP (JJ ectothermic) (CC or) (JJ heterothermic)) (NNS vertebrates)) (PRN (-LRB- -LRB-) (ADJP (RB commonly) (JJ referred) (PP (TO to) (ADJP (RB as) (JJ cold-blooded)))) (-RRB- -RRB-))) (, ,) (S (VP (VBG meaning) (SBAR (S (NP (PRP they)) (VP (VBP do) (RB not) (VP (VB have) (NP (DT an) (JJ automatic) (JJ internal) (NN body) (NN temperature) (NN control) (NN system))))))))) (. .)))
Reptiles are ectothermic or heterothermic vertebrates (commonly referred to as cold-blooded), meaning they do not have an automatic internal body temperature control system.
(ROOT (S (NP (JJ Ectothermic) (NNS vertebrates)) (VP (VBP control) (NP (NN body) (NN temperature)) (PP (TO to) (NP (NP (RB just) (DT a) (JJ limited) (NN extent)) (PP (IN from) (NP (DT the) (NN outside))))) (PP (IN by) (S (VP (VBG changing) (NP (NN behavior)))))) (. .)))