( ( ( Metabolism Sum ) ( of ( ( the ( ( ( physical and ) chemical ) changes ) ) ( that ( take ( place ( in ( living organisms ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Metabolism) (NNP Sum)) (PP (IN of) (NP (NP (DT the) (ADJP (NN physical) (CC and) (NN chemical)) (NNS changes)) (SBAR (WHNP (WDT that)) (S (VP (VBP take) (NP (NP (NN place)) (PP (IN in) (NP (VBG living) (NNS organisms))))))))) (. .)))
Metabolism Sum of the physical and chemical changes that take place in living organisms.
(ROOT (S (NP (NP (DT The) (NN sum)) (PP (IN of) (NP (NP (DT all) (JJ chemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP take) (NP (NN place)) (PP (IN within) (NP (DT an) (NN organism))))))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN metabolism))))) (. .)))
The sum of all chemical reactions that take place within an organism is known as metabolism.