( Penis ( ( The penis ) ( ( is ( ( ( ( ( composed ( of ( ( three ( cylindrical bodies ) ) ( of ( spongy ( cavernous tissue ) ) ) ) ) ) , ) ( ( bound together ) ( by ( connective tissue ) ) ) ) and ) ( loosely ( covered ( by ( ( a layer ) ( of skin ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Penis)) (NP (DT The) (NNS penis)) (VP (VBZ is) (VP (VP (VBN composed) (PP (IN of) (NP (NP (CD three) (JJ cylindrical) (NNS bodies)) (PP (IN of) (NP (JJ spongy) (JJ cavernous) (NN tissue)))))) (, ,) (VP (VBN bound) (ADVP (RB together)) (PP (IN by) (NP (JJ connective) (NN tissue)))) (CC and) (VP (ADVP (RB loosely)) (VBN covered) (PP (IN by) (NP (NP (DT a) (NN layer)) (PP (IN of) (NP (NN skin)))))))) (. .)))
Penis The penis is composed of three cylindrical bodies of spongy cavernous tissue, bound together by connective tissue and loosely covered by a layer of skin.
(ROOT (S (NP (DT The) (JJ human) (NNS penis)) (VP (VBZ contains) (NP (NP (DT the) (NN urethra)) (, ,) (CONJP (RB as) (RB well) (IN as)) (NP (NP (CD three) (NNS cylinders)) (PP (IN of) (NP (ADJP (RB spongy) (JJ erectile)) (NN tissue)))))) (. .)))
The human penis contains the urethra, as well as three cylinders of spongy erectile tissue.