( ( ( The enzymes ) ( in saliva ) ) ( ( ( ( initiate ( ( the ( digestion process ) ) ( of ( ingested food ) ) ) ) and ) ( ( break down ) ( ( food particles ) ( that ( ( ( accumulate ( in ( dental crevices ) ) ) , ) ( ( protecting teeth ) ( from ( bacterial decay ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS enzymes)) (PP (IN in) (NP (NN saliva)))) (VP (VP (VBP initiate) (NP (NP (DT the) (NN digestion) (NN process)) (PP (IN of) (NP (JJ ingested) (NN food))))) (CC and) (VP (NN break) (PRT (RP down)) (NP (NP (NN food) (NNS particles)) (SBAR (WHNP (WDT that)) (S (VP (VBP accumulate) (PP (IN in) (NP (JJ dental) (NNS crevices))) (, ,) (S (VP (VBG protecting) (NP (NNS teeth)) (PP (IN from) (NP (JJ bacterial) (NN decay))))))))))) (. .)))
The enzymes in saliva initiate the digestion process of ingested food and break down food particles that accumulate in dental crevices, protecting teeth from bacterial decay.
(ROOT (S (NP (NNP Saliva) (NNP secretion)) (VP (VBZ initiates) (NP (NN chemical) (NN digestion)) (PP (IN while) (S (ADVP (RB also)) (VP (VBG protecting) (NP (DT the) (JJ oral) (NN cavity)))))) (. .)))