( Metabolism ( ( ( is ( chemical reactions ) ) ( taking ( ( ( place ( inside cells ) ) , ) ( including respiration ) ) ) ) . ) )
(ROOT (SINV (ADVP (RB Metabolism)) (VBZ is) (NP (NN chemical) (NNS reactions)) (VP (VBG taking) (NP (NP (NN place)) (PP (IN inside) (NP (NNS cells))) (, ,) (PP (VBG including) (NP (NN respiration))))) (. .)))
Metabolism is chemical reactions taking place inside cells, including respiration.
(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.