( ( The ( digestive system ) ) ( ( ( ( uses ( mechanical ( and ( chemical methods ) ) ) ) ( to ( ( break food ) ( ( down ( into ( nutrient molecules ) ) ) ( ( that ( can ( be ( absorbed ( into ( the blood ) ) ) ) ) ) . ) ) ) ) ) ( Once ( ( in ( the blood ) ) ( , ( ( the ( food molecules ) ) ( are ( routed ( to ( ( every cell ) ( in ( ( the ( animal 's ) ) body ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ digestive) (NN system)) (VP (VBZ uses) (NP (JJ mechanical) (CC and) (NN chemical) (NNS methods)) (S (VP (TO to) (VP (VB break) (NP (NN food)) (ADVP (ADVP (RB down) (PP (IN into) (NP (JJ nutrient) (NNS molecules)))) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB be) (VP (VBN absorbed) (PP (IN into) (NP (DT the) (NN blood))))))) (. .)))))) (SBAR (RB Once) (S (PP (IN in) (NP (DT the) (NN blood))) (, ,) (NP (DT the) (NN food) (NNS molecules)) (VP (VBP are) (VP (VBN routed) (PP (TO to) (NP (NP (DT every) (NN cell)) (PP (IN in) (NP (NP (DT the) (NN animal) (POS 's)) (NN body)))))))))) (. .)))
The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. Once in the blood, the food molecules are routed to every cell in the animal's body.
(ROOT (S (NP (NP (DT The) (JJ main) (NN function)) (PP (IN of) (NP (DT the) (JJ human) (NN digestive) (NN system)))) (VP (VBZ is) (S (VP (TO to) (VP (VB break) (PRT (RP down)) (NP (NP (NNS foods)) (PP (IN for) (NP (NN absorption)))) (PP (IN into) (NP (DT the) (NN blood))))))) (. .)))