( ( Cardiac muscles ) ( ( ( ( ( are ( striated ( -LRB- ( ( but less ) ( ( distinct ( than ( skeletal muscles ) ) ) -RRB- ) ) ) ) ) , ) and ) ( are involuntary ) ) . ) )
(ROOT (S (NP (NNP Cardiac) (NNS muscles)) (VP (VP (VBP are) (VP (VBN striated) (PRN (-LRB- -LRB-) (ADVP (RB but) (JJR less)) (ADJP (JJ distinct) (PP (IN than) (NP (JJ skeletal) (NNS muscles)))) (-RRB- -RRB-)))) (, ,) (CC and) (VP (VBP are) (ADJP (JJ involuntary)))) (. .)))
Cardiac muscles are striated (but less distinct than skeletal muscles), and are involuntary .
(ROOT (S (PP (IN Like) (NP (JJ skeletal) (NN muscle))) (, ,) (NP (JJ cardiac) (NN muscle)) (VP (VBZ is) (VP (VBN striated))) (. .)))