( ( ( ( Growth and ) Development ) ( of ( ( Bones Early ) ( in ( ( the development ) ( of ( ( ( a ( human fetus ) ) , ) ( the skeleton ) ) ) ) ) ) ) ) ( ( is ( ( made entirely ) ( of cartilage ) ) ) . ) )
(ROOT (S (NP (NP (NNP Growth) (CC and) (NNP Development)) (PP (IN of) (NP (NP (NNP Bones) (NNP Early)) (PP (IN in) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (NP (DT a) (JJ human) (NN fetus)) (, ,) (NP (DT the) (NN skeleton))))))))) (VP (VBZ is) (VP (VBN made) (ADVP (RB entirely)) (PP (IN of) (NP (NN cartilage))))) (. .)))
Growth and Development of Bones   Early in the development of a human fetus, the skeleton is made entirely of cartilage.
(ROOT (S (ADVP (RB Early) (PP (IN in) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (DT a) (JJ human) (NN fetus)))))) (, ,) (NP (DT the) (NN skeleton)) (VP (VBZ is) (VP (VBN made) (ADVP (RB entirely)) (PP (IN of) (NP (NN cartilage))))) (. .)))