( ( ( ( The ( ( ( structural and ) functional ) aspects ) ) ( of ( the ( human body ) ) ) ) ( ( ( starting ( at ( ( the level ) ( of ( the cell ) ) ) ) ) and ) ( continuing ( to ( tissues ( , ( organs ( , ( and ( organ systems ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NP (DT The) (ADJP (JJ structural) (CC and) (JJ functional)) (NNS aspects)) (PP (IN of) (NP (DT the) (JJ human) (NN body)))) (VP (VP (VBG starting) (PP (IN at) (NP (NP (DT the) (NN level)) (PP (IN of) (NP (DT the) (NN cell)))))) (CC and) (VP (VBG continuing) (PP (TO to) (NP (NNS tissues) (, ,) (NNS organs) (, ,) (CC and) (NN organ) (NNS systems))))) (. .)))
The structural and functional aspects of the human body starting at the level of the cell and continuing to tissues, organs, and organ systems.
(ROOT (S (NP (DT The) (NN sequence) (NN cell) (CD →) (NN tissue) (CD →) (NN organ) (CD →) (NN organ) (NN system)) (VP (VBZ identifies) (NP (NP (DT the) (NNS levels)) (PP (IN of) (NP (NP (NN organization)) (PP (IN of) (NP (NP (NN body) (NNS structures)) (PP (IN in) (NP (DT a) (NN human)))))))) (PP (IN from) (NP (NP (JJS simplest)) (PP (TO to) (NP (JJS most) (NN complex)))))) (. .)))
The sequence cell → tissue → organ → organ system identifies the levels of organization of body structures in a human from simplest to most complex.