( ( Cardiac muscle ) ( ( is ( ( the ( striated ( , ( involuntary muscle ) ) ) ) ( of ( the heart ) ) ) ) . ) )
(ROOT (S (NP (NNP Cardiac) (NN muscle)) (VP (VBZ is) (NP (NP (DT the) (JJ striated) (, ,) (JJ involuntary) (NN muscle)) (PP (IN of) (NP (DT the) (NN heart))))) (. .)))
Cardiac muscle is the striated, involuntary muscle of the heart.
(ROOT (S (PP (IN Like) (NP (JJ skeletal) (NN muscle))) (, ,) (NP (JJ cardiac) (NN muscle)) (VP (VBZ is) (VP (VBN striated))) (. .)))