( ( ( The advantage ) ( of ( ( a ( long ( , ( narrow ( respiratory passage ) ) ) ) ) ( for ( a ( desert animal ) ) ) ) ) ) ( ( ( ( is ( that ( ( ( the ( heat exchange ) ) ( that occurs ) ) ( is ( more complete ) ) ) ) ) , ) ( ( ( ( ( allowing ( for ( less water ) ) ) ( to ( be ( released ( into ( ( the air ) ( from ( each breath ) ) ) ) ) ) ) ) , ) and ) ( ( allowing ( less water ) ) ( to ( be ( needed ( to ( saturate ( the ( next ( inhaled breath ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN advantage)) (PP (IN of) (NP (NP (DT a) (JJ long) (, ,) (JJ narrow) (JJ respiratory) (NN passage)) (PP (IN for) (NP (DT a) (NN desert) (NN animal)))))) (VP (VBZ is) (SBAR (IN that) (S (NP (NP (DT the) (NN heat) (NN exchange)) (SBAR (WHNP (WDT that)) (S (VP (VBZ occurs))))) (VP (VBZ is) (ADJP (RBR more) (JJ complete))))) (, ,) (S (VP (VP (VBG allowing) (PP (IN for) (NP (JJR less) (NN water))) (S (VP (TO to) (VP (VB be) (VP (VBN released) (PP (IN into) (NP (NP (DT the) (NN air)) (PP (IN from) (NP (DT each) (NN breath)))))))))) (, ,) (CC and) (VP (VBG allowing) (NP (JJR less) (NN water)) (S (VP (TO to) (VP (VB be) (VP (VBN needed) (S (VP (TO to) (VP (VB saturate) (NP (DT the) (JJ next) (JJ inhaled) (NN breath))))))))))))) (. .)))
The advantage of a long, narrow respiratory passage for a desert animal is that the heat exchange that occurs is more complete, allowing for less water to be released into the air from each breath, and allowing less water to be needed to saturate the next inhaled breath.
(ROOT (S (NP (NNP Narrow) (NN air) (NNS passages)) (VP (VBP make) (S (VP (VBG breathing) (ADJP (JJ difficult) (RB due) (S (VP (TO to) (VP (VB respiratory) (NP (NN system) (NN disease))))))))) (. .)))