( IgA ( ( is ( ( the antibody ) ( that ( plays ( ( an ( important role ) ) ( in ( ( ( ( ( the ( body 's ) ) defenses ) ( against ( ( the invasion ) ( of ( microorganisms ( through ( mucous ( membrane-lined surfaces ) ) ) ) ) ) ) ) , ) ( including ( ( ( ( ( ( ( ( the nose ) , ) eyes ) , ) lungs ) , ) and ) intestines ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP IgA)) (VP (VBZ is) (NP (NP (DT the) (NN antibody)) (SBAR (WHNP (WDT that)) (S (VP (VBZ plays) (NP (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (NP (NP (DT the) (NN body) (POS 's)) (NNS defenses)) (PP (IN against) (NP (NP (DT the) (NN invasion)) (PP (IN of) (NP (NP (NNS microorganisms)) (PP (IN through) (NP (JJ mucous) (JJ membrane-lined) (NNS surfaces))))))) (, ,) (PP (VBG including) (NP (NP (DT the) (NN nose)) (, ,) (NP (NNS eyes)) (, ,) (NP (NNS lungs)) (, ,) (CC and) (NP (NNS intestines)))))))))))) (. .)))
IgA is the antibody that plays an important role in the body's defenses against the invasion of microorganisms through mucous membrane-lined surfaces, including the nose, eyes, lungs, and intestines.
(ROOT (S (NP (NNS Antibodies)) (VP (VBP recognize) (CC and) (VBP combine) (PP (IN with) (NP (JJ harmful) (NNS materials))) (, ,) (PP (VBG including) (NP (NP (DT both) (JJ toxic) (NNS chemicals)) (CC and) (NP (JJ invasive) (NNS microorganisms))))) (. .)))