( ( The ( epithelial tissues ) ) ( ( are ( formed ( by ( cells ( that ( cover ( ( the ( organ surfaces ) ) ( such ( as ( ( the surface ) ( of ( ( ( ( ( ( ( ( the skin ) , ) ( the airways ) ) , ) ( the ( reproductive tract ) ) ) , ) and ) ( ( the ( inner lining ) ) ( of ( the ( digestive tract ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ epithelial) (NNS tissues)) (VP (VBP are) (VP (VBN formed) (PP (IN by) (NP (NP (NNS cells)) (SBAR (WHNP (WDT that)) (S (VP (VBP cover) (NP (NP (DT the) (NN organ) (NNS surfaces)) (PP (JJ such) (IN as) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NP (DT the) (NN skin)) (, ,) (NP (DT the) (NNS airways)) (, ,) (NP (DT the) (JJ reproductive) (NN tract)) (, ,) (CC and) (NP (NP (DT the) (JJ inner) (NN lining)) (PP (IN of) (NP (DT the) (JJ digestive) (NN tract)))))))))))))))) (. .)))
The epithelial tissues are formed by cells that cover the organ surfaces such as the surface of the skin, the airways, the reproductive tract, and the inner lining of the digestive tract.
(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))))))) (. .)))