( ( descriptions ( of ( ( ( ( ( body systems ) ( such ( as circulatory ) ) ) , ) ( pulmonary ( , ( and ( excretory systems ) ) ) ) ) ; ) ) ) ... )
(ROOT (NP (NP (NNS descriptions)) (PP (IN of) (NP (NP (NP (NN body) (NNS systems)) (PP (JJ such) (IN as) (NP (NN circulatory)))) (, ,) (NP (JJ pulmonary) (, ,) (CC and) (NN excretory) (NNS systems)) (: ;))) (: ...)))
descriptions of body systems such as circulatory, pulmonary, and excretory systems;...
(ROOT (S (NP (NNS Hormones)) (ADVP (RB generally)) (VP (VBP travel) (PP (IN through) (NP (NP (DT the) (JJ circulatory) (NN system) (NN system)) (PP (IN of) (NP (DT the) (NN body)))))) (. .)))