( ( ( Vitamins Group ) ( of ( ( chemically unrelated ) ( organic compounds ) ) ) ) ( Generally ( ( ( ( function ( as ( metabolic catalysts ) ) ) usually ) ( in ( ( the form ) ( of ( coenzymes ( Considered ( ( an ( accessory food ) ) ( ( ( ( Digestive Secretions ) and ) ( Their ( Functions ( Saliva-facilitates ( mastication ( and ( deglutition Volume ) ) ) ) ) ) ) ( ( varies considerably ) ( among species ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (NNP Vitamins) (NNP Group)) (PP (IN of) (NP (ADJP (ADVP (RB chemically)) (JJ unrelated)) (JJ organic) (NNS compounds)))) (ADVP (RB Generally)) (VP (VBP function) (PP (IN as) (NP (JJ metabolic) (NNS catalysts))) (ADVP (RB usually)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NP (NNS coenzymes)) (VP (VBN Considered) (NP (NP (DT an) (JJ accessory) (NN food)) (SBAR (S (NP (NP (NNP Digestive) (NNP Secretions)) (CC and) (NP (PRP$ Their) (NNP Functions) (NNP Saliva-facilitates) (NN mastication) (CC and) (NN deglutition) (NN Volume))) (VP (VBZ varies) (ADVP (RB considerably)) (PP (IN among) (NP (NNS species))))))))))))) (. .)))
Vitamins Group of chemically unrelated organic compounds Generally function as metabolic catalysts usually in the form of coenzymes Considered an accessory food Digestive Secretions and Their Functions Saliva-facilitates mastication and deglutition Volume varies considerably among species.
(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)))))) (. .)))