( Cardiac ( muscle -- ) )
(ROOT (NP (JJ Cardiac) (NN muscle) (: --)))
Cardiac muscle --
(ROOT (S (NP (NNP Cardiac) (NN muscle)) (VP (VBZ makes) (PRT (RP up)) (NP (NP (JJS most)) (PP (IN of) (NP (DT the) (NN heart))))) (. .)))