( ( ( Studying ( ( the distribution ) ( of NTE ) ) ) ( in ( rats ( , ( ( hen and ) man ) ) ) ) ) ( ( have ( revealed ( that ( NTE ( ( is ( present ( ( ( ( ( not only ) ( in ( the ( nervous tissues ) ) ) ) but ) ( ( lymphatic and ) other ) ) tissues ) ) ) ( as well ) ) ) ) ) ) . ) )
(ROOT (S (S (VP (VBG Studying) (NP (NP (DT the) (NN distribution)) (PP (IN of) (NP (NNP NTE)))) (PP (IN in) (NP (NNS rats) (, ,) (NN hen) (CC and) (NN man))))) (VP (VBP have) (VP (VBN revealed) (SBAR (IN that) (S (NP (NNP NTE)) (VP (VBZ is) (NP (JJ present) (UCP (NP (NP (RB not) (RB only)) (PP (IN in) (NP (DT the) (JJ nervous) (NNS tissues)))) (CC but) (ADJP (JJ lymphatic) (CC and) (JJ other))) (NNS tissues)) (ADVP (RB as) (RB well))))))) (. .)))
Studying the distribution of NTE in rats, hen and man have revealed that NTE is present not only in the nervous tissues but lymphatic and other tissues as well.
(ROOT (S (NP (JJ Only) (NNS animals)) (VP (VBP have) (NP (NP (NN muscle) (NN tissue)) (CC and) (NP (JJ nervous) (NN tissue)))) (. .)))
Only animals have muscle tissue and nervous tissue.