( ( ( This form ) ( of ( positive feedback ) ) ) ( ( ( ( intensifies and ) prolongs ) ( the ( clotting tendency ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN form)) (PP (IN of) (NP (JJ positive) (NN feedback)))) (VP (VBZ intensifies) (CC and) (VBZ prolongs) (NP (DT the) (JJ clotting) (NN tendency))) (. .)))
This form of positive feedback intensifies and prolongs the clotting tendency.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))