( ( ( The ( ethmoid air ) ) ( ( cells and ) ( the ( nasal cavity ) ) ) ) . )
(ROOT (NP (NP (DT The) (JJ ethmoid) (NN air)) (NP (NP (NNS cells)) (CC and) (NP (DT the) (JJ nasal) (NN cavity))) (. .)))
The ethmoid air cells and the nasal cavity.
(ROOT (S (PP (IN In) (NP (NNS mammals))) (, ,) (NP (NN air)) (VP (VBZ is) (VP (VBN warmed) (CC and) (VBN humidified) (PP (IN in) (NP (DT the) (JJ nasal) (NN cavity))))) (. .)))