( This ( ( makes ( ( the ( carbon ( dioxide level ) ) ) ( in ( your ( blood ( and ( brain ( tissue fall ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ makes) (NP (NP (DT the) (NN carbon) (NN dioxide) (NN level)) (PP (IN in) (NP (PRP$ your) (NN blood) (CC and) (NN brain) (NN tissue) (NN fall))))) (. .)))
This makes the carbon dioxide level in your blood and brain tissue fall.
(ROOT (S (NP (DT The) (NN brain)) (VP (VBP stem) (S (NP (NP (NN monitor)) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-))) (NP (NP (DT the) (NN level)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN blood)))))))) (. .)))