( ( ( The ( cow 's ) ) ( digestive system ) ) ( ( starts ( with ( ( ( the ( oral cavity ) ) , ) ( including ( ( ( teeth and ) saliva ) ( Which ( are ( used ( to ( ( ( grind ( the food ) ) and ) ( ( give it ) ( enough ( moisture ( to ( make ( it ( easier ( to swallow ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN cow) (POS 's)) (JJ digestive) (NN system)) (VP (VBZ starts) (PP (IN with) (NP (NP (DT the) (JJ oral) (NN cavity)) (, ,) (PP (VBG including) (NP (NP (NNS teeth) (CC and) (NNS saliva)) (SBAR (WHNP (WDT Which)) (S (VP (VBP are) (VP (VBN used) (S (VP (TO to) (VP (VP (VB grind) (NP (DT the) (NN food))) (CC and) (VP (VB give) (NP (PRP it)) (NP (JJ enough) (NN moisture) (S (VP (TO to) (VP (VB make) (S (NP (PRP it)) (ADJP (RBR easier)) (S (VP (TO to) (VP (VB swallow)))))))))))))))))))))) (. .)))
The cow's digestive system starts with the oral cavity, including teeth and saliva Which are used to grind the food and give it enough moisture to make it easier to swallow.
(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)))))) (. .)))