( ( ( Functions ( of ( ( the ( circulatory system ) ) ( in humans ) ) ) ) : ) ( Transport ( of ( ( Nutrients and ) Wastes ) ) ) )
(ROOT (NP (NP (NP (NNS Functions)) (PP (IN of) (NP (NP (DT the) (JJ circulatory) (NN system)) (PP (IN in) (NP (NNS humans)))))) (: :) (NP (NP (NNP Transport)) (PP (IN of) (NP (NNPS Nutrients) (CC and) (NNPS Wastes))))))
Functions of the circulatory system in humans: Transport of Nutrients and Wastes
(ROOT (S (NP (NP (DT The) (JJ main) (NN function)) (PP (IN of) (NP (DT the) (JJ circulatory) (NN system)))) (VP (VBZ is) (S (VP (TO to) (VP (VB transport) (NP (NNS materials)))))) (. .)))