( ( ( Several ( tissue types ) ) ( have ( been ( targeted ( for ( tissue engineering ) ) ) ) ) ) ( , ( these ( ( include ( skin ( , ( cartilage ( , ( liver ( , ( vascular ( system ( , ( ( pancreas and ) bone ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (JJ Several) (NN tissue) (NNS types)) (VP (VBP have) (VP (VBN been) (VP (VBN targeted) (PP (IN for) (NP (NN tissue) (NN engineering))))))) (, ,) (NP (DT these)) (VP (VBP include) (NP (NN skin) (, ,) (NN cartilage) (, ,) (NN liver) (, ,) (JJ vascular) (NN system) (, ,) (NN pancreas) (CC and) (NN bone))) (. .)))
Several tissue types have been targeted for tissue engineering, these include skin, cartilage, liver, vascular system, pancreas and bone.
(ROOT (S (NP (DT The) (NN ground) (NN tissue) (NN system)) (VP (VBZ has) (NP (ADJP (CC neither) (JJ dermal) (CC nor) (JJ vascular)) (NNS tissues))) (. .)))