( ( Epithelial tissue ) ( ( covers ( ( external ( and ( internal surfaces ) ) ) ( of ( the ( body organs ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Epithelial) (NN tissue)) (VP (VBZ covers) (NP (NP (JJ external) (CC and) (JJ internal) (NNS surfaces)) (PP (IN of) (NP (DT the) (NN body) (NNS organs))))) (. .)))
Epithelial tissue covers external and internal surfaces of the body organs.
(ROOT (S (NP (NNP Epithelial) (. ?) (NNP tissue)) (VP (VBZ consists) (PP (IN of) (NP (NP (NNS cells)) (SBAR (WHNP (WHNP (WDT that) (NN cover)) (NP (JJ inner) (CC and) (JJ outer) (NN body))) (S (VP (VBZ surfaces))))))) (. .)))