( They ( ( ( were not ) ( observed ( in ( ( other ( organ systems ) ) ( including ( kidney ( , ( brain ( , ( lung ( , ( liver ( , ( heart ( , ( or ( intestinal tract ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD were) (RB not) (VP (VBN observed) (PP (IN in) (NP (NP (JJ other) (NN organ) (NNS systems)) (PP (VBG including) (NP (NN kidney) (, ,) (NN brain) (, ,) (NN lung) (, ,) (NN liver) (, ,) (NN heart) (, ,) (CC or) (NN intestinal) (NN tract))))))) (. .)))
They were not observed in other organ systems including kidney, brain, lung, liver, heart, or intestinal tract.
(ROOT (S (NP (NP (NNS Kidneys)) (, ,) (NP (JJ large) (NN intestine)) (, ,) (NP (NN liver)) (, ,) (NP (NN skin)) (, ,) (CC and) (NP (NNS lungs))) (VP (VBP comprise) (NP (DT the) (JJ excretory) (NN system))) (. .)))