( Amphibians ( ( are ( ( cold-blooded ( -LRB- ( ectothermic ( -RRB- vertebrates ) ) ) ) ( that ( ( can not ) ( ( maintain ( body temperature ) ) ( through ( their ( internal ( physiological procedures ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Amphibians)) (VP (VBP are) (NP (NP (JJ cold-blooded) (-LRB- -LRB-) (JJ ectothermic) (-RRB- -RRB-) (NNS vertebrates)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB maintain) (NP (NN body) (NN temperature)) (PP (IN through) (NP (PRP$ their) (JJ internal) (JJ physiological) (NNS procedures))))))))) (. .)))
Amphibians are cold-blooded (ectothermic) vertebrates that cannot maintain body temperature through their internal physiological procedures.
(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)))))) (. .)))