( ( Within ( the ( nasal cavity ) ) ) ( , ( ( a ( straight septum ) ) ( ( ( ( enables ( laminar airflow ) ) , ) ( ( allowing ( the ( inspired air ) ) ) ( to ( be ( ( ( ( warmed , ) ( ( ( cleaned , ) and ) humidified ) ) and ) ( thus ( ( optimized ( for ( gas exchange ) ) ) ( at ( ( the alveoli ) ( in ( the lungs ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Within) (NP (DT the) (JJ nasal) (NN cavity))) (, ,) (NP (DT a) (JJ straight) (NN septum)) (VP (VBZ enables) (NP (NN laminar) (NN airflow)) (, ,) (S (VP (VBG allowing) (NP (DT the) (JJ inspired) (NN air)) (S (VP (TO to) (VP (VB be) (VP (VP (VBN warmed)) (, ,) (VP (VBN cleaned) (, ,) (CC and) (VBN humidified)) (CC and) (VP (ADVP (RB thus)) (VBN optimized) (PP (IN for) (NP (NN gas) (NN exchange))) (PP (IN at) (NP (NP (DT the) (NNS alveoli)) (PP (IN in) (NP (DT the) (NNS lungs))))))))))))) (. .)))
Within the nasal cavity, a straight septum enables laminar airflow, allowing the inspired air to be warmed, cleaned, and humidified and thus optimized for gas exchange at the alveoli in the lungs.
(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))))) (. .)))