( Vasculitis ( ( can ( affect ( very ( ( ( small ( blood vessels ) ) ( -LRB- ( capillaries -RRB- ) ) ) ( , ( ( ( medium ( size ( blood vessels ) ) ) ( -LRB- ( ( ( arterioles or ) venules ) -RRB- ) ) ) ( , ( or ( ( large ( blood vessels ) ) ( -LRB- ( ( ( arteries or ) veins ) -RRB- ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Vasculitis)) (VP (MD can) (VP (VB affect) (NP (JJ very) (NX (NX (NX (JJ small) (NN blood) (NNS vessels)) (PRN (-LRB- -LRB-) (NP (NNS capillaries)) (-RRB- -RRB-))) (, ,) (NX (NX (NN medium) (NN size) (NN blood) (NNS vessels)) (PRN (-LRB- -LRB-) (NP (NP (NNS arterioles)) (CC or) (NP (NNS venules))) (-RRB- -RRB-))) (, ,) (CC or) (NX (NX (JJ large) (NN blood) (NNS vessels)) (PRN (-LRB- -LRB-) (NP (NP (NNS arteries)) (CC or) (NP (NNS veins))) (-RRB- -RRB-))))))) (. .)))
Vasculitis can affect very small blood vessels (capillaries), medium size blood vessels (arterioles or venules), or large blood vessels (arteries or veins).
(ROOT (S (NP (NNS Capillaries)) (VP (VBP are) (NP (NP (DT the) (JJS smallest) (NN type)) (PP (IN of) (NP (NN blood) (NNS vessels))))) (. .)))