( ( On ( the contrary ) ) ( , ( ( the ( ( parasympathetic nervous ) system ) ) ( ( is ( referred ( to ( as ( the ( `` ( rest ( and ( digest ( '' mechanism ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (NN contrary))) (, ,) (NP (DT the) (ADJP (JJ parasympathetic) (JJ nervous)) (NN system)) (VP (VBZ is) (VP (VBN referred) (PP (TO to) (NP (IN as) (DT the) (`` ``) (NN rest) (CC and) (NN digest) ('' '') (NN mechanism))))) (. .)))
On the contrary, the parasympathetic nervous system is referred to as the &quot;rest and digest&quot; mechanism.
(ROOT (S (NP (DT The) (JJ parasympathetic) (NN system)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (VP (VBN referred) (S (VP (TO to))) (PP (IN as) (NP (DT the) (JJ craniosacral) (NN system)))))) (. .)))