( It ( ( consists ( of ( ( ( ( the ( gastrointestinal tract ) ) ( -LRB- ( gut -RRB- ) ) ) , ) ( ( an ( extensive tube ) ) ( ( extending ( from ( the mouth ) ) ) ( to ( ( ( the anus ) , ) ( ( through which ) ( ( ( ( ( the ( swallowing ( , ( digestion ( , ( and assimilation ) ) ) ) ) ) ( of food ) ) and ) ( ( the elimination ) ( of ( waste products ) ) ) ) ( are accomplished ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ consists) (PP (IN of) (NP (NP (NP (DT the) (JJ gastrointestinal) (NN tract)) (PRN (-LRB- -LRB-) (NP (NN gut)) (-RRB- -RRB-))) (, ,) (NP (NP (DT an) (JJ extensive) (NN tube)) (VP (VBG extending) (PP (IN from) (NP (DT the) (NN mouth))) (PP (TO to) (NP (NP (DT the) (NNS anus)) (, ,) (SBAR (WHPP (IN through) (WHNP (WDT which))) (S (NP (NP (NP (DT the) (NN swallowing) (, ,) (NN digestion) (, ,) (CC and) (NN assimilation)) (PP (IN of) (NP (NN food)))) (CC and) (NP (NP (DT the) (NN elimination)) (PP (IN of) (NP (NN waste) (NNS products))))) (VP (VBP are) (VP (VBN accomplished)))))))))))) (. .)))
It consists of the gastrointestinal tract (gut), an extensive tube extending from the mouth to the anus, through which the swallowing, digestion, and assimilation of food and the elimination of waste products are accomplished.
(ROOT (S (NP (DT The) (NN term) (NN gastrointestinal) (NN tract)) (VP (VBZ describes) (NP (NP (DT the) (JJ long) (NN tube)) (SBAR (WHNP (WDT that)) (S (VP (VBZ connects) (NP (DT the) (NN mouth)) (PP (TO to) (NP (DT the) (NNS anus)))))))) (. .)))