( ( ( ( ( The study ) ( of ( ( ( cellular ( and ( tissue structure ) ) ) and ) ( the interrelationships ) ) ) ) ( of ( tissues ( in ( the ( organ systems ) ) ) ) ) ) ( of ( the ( human body ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN study)) (PP (IN of) (NP (NP (JJ cellular) (CC and) (NN tissue) (NN structure)) (CC and) (NP (DT the) (NNS interrelationships)))) (PP (IN of) (NP (NP (NNS tissues)) (PP (IN in) (NP (DT the) (NN organ) (NNS systems))))) (PP (IN of) (NP (DT the) (JJ human) (NN body))) (. .)))
The study of cellular and tissue structure and the interrelationships of tissues in the organ systems of the human body.
(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.