( Students ( also ( ( study ( ( ( ( ( ( ( ( the ( central ( nervous system ) ) ) , ) ( skeletal ( and ( muscular systems ) ) ) ) , ) ( internal organs ) ) , ) and ) ( ( the ( germ theory ) ) ( of disease ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Students)) (ADVP (RB also)) (VP (VBP study) (NP (NP (DT the) (JJ central) (JJ nervous) (NN system)) (, ,) (NP (JJ skeletal) (CC and) (JJ muscular) (NNS systems)) (, ,) (NP (JJ internal) (NNS organs)) (, ,) (CC and) (NP (NP (DT the) (NN germ) (NN theory)) (PP (IN of) (NP (NN disease)))))) (. .)))
Students also study the central nervous system, skeletal and muscular systems, internal organs, and the germ theory of disease.
(ROOT (S (ADVP (RB Together)) (, ,) (NP (DT the) (JJ muscular) (CC and) (JJ skeletal) (NNS organs)) (VP (VBP are) (VP (VBN known) (PP (IN as) (NP (DT the) (JJ musculoskeletal) (NN system))))) (. .)))
Together, the muscular and skeletal organs are known as the musculoskeletal system.