( ( These ( basic functions ) ) ( ( include ( separation ( , ( filtration ( , ( reinforcement ( and ( stress absorption ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (JJ basic) (NNS functions)) (VP (VBP include) (NP (NN separation) (, ,) (NN filtration) (, ,) (NN reinforcement) (CC and) (NN stress) (NN absorption))) (. .)))
These basic functions include separation, filtration, reinforcement and stress absorption.
(ROOT (S (NP (NP (DT The) (JJ main) (NNS functions)) (PP (IN of) (NP (NN epithelia)))) (VP (VBP are) (NP (NP (NN protection)) (PP (IN from) (NP (NP (DT the) (NN environment) (, ,) (NN coverage) (, ,) (NN secretion) (CC and) (NN excretion)) (, ,) (NP (NN absorption)) (, ,) (CC and) (NP (NN filtration)))))) (. .)))