( ( ( ( Fungi ( are ( absorptive heterotrophs ) ) ) : ) ( they ( ( ( ( ( break down ) food ) ( by ( ( secreting ( digestive enzymes ) ) ( onto ( a substrate ) ) ) ) ) and ) ( then ( absorb ( the ( resulting ( small ( food molecules ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Fungi)) (VP (VBP are) (NP (JJ absorptive) (NNS heterotrophs)))) (: :) (S (NP (PRP they)) (VP (VP (VB break) (PRT (RP down)) (NP (NN food)) (PP (IN by) (S (VP (VBG secreting) (NP (JJ digestive) (NNS enzymes)) (PP (IN onto) (NP (DT a) (NN substrate))))))) (CC and) (VP (ADVP (RB then)) (VB absorb) (NP (DT the) (JJ resulting) (JJ small) (NN food) (NNS molecules))))) (. .)))
Fungi are absorptive heterotrophs: they break down food by secreting digestive enzymes onto a substrate and then absorb the resulting small food molecules .
(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))))))) (. .)))