( ( Because ( there ( are ( ( an ( estimated ( 2-6 ( lung macrophages ) ) ) ) ( per ( lung alveolus ) ) ) ) ) ) ( , ( ( these particles ) ( ( will ( be ( ( ( ( ( ( readily ( ingested ( by ( lung macrophages ) ) ) ) , ) ( sequestered ( in phagolysosomes ) ) ) , ) and ) ( ( transported out ) ( of ( the lungs ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (EX there)) (VP (VBP are) (NP (NP (DT an) (JJ estimated) (CD 2-6) (NN lung) (NNS macrophages)) (PP (IN per) (NP (NN lung) (NNS alveolus))))))) (, ,) (NP (DT these) (NNS particles)) (VP (MD will) (VP (VB be) (VP (VP (ADVP (RB readily)) (VBN ingested) (PP (IN by) (NP (NN lung) (NNS macrophages)))) (, ,) (VP (VBN sequestered) (PP (IN in) (NP (NNS phagolysosomes)))) (, ,) (CC and) (VP (VBN transported) (PRT (RP out)) (PP (IN of) (NP (DT the) (NNS lungs))))))) (. .)))
Because there are an estimated 2-6 lung macrophages per lung alveolus, these particles will be readily ingested by lung macrophages, sequestered in phagolysosomes, and transported out of the lungs.
(ROOT (S (NP (NP (DT The) (NNS lungs)) (PP (IN of) (NP (NNS mammals)))) (VP (VBP are) (ADJP (JJ unique) (PP (IN in) (S (VP (VBG having) (NP (NNS alveoli))))))) (. .)))