( ( ( ( ( ( ( ( ( The material ) ( ( ( ( begins ( with ( ( the basics ) ( of ( anatomical positioning ) ) ) ) ) ( -LRB- ( ( ( knowing ( your anterior ) ) ( from ( your posterior ) ) ) -RRB- ) ) ) and ) ( moves ( to ( the ( skeletal system ) ) ) ) ) ) , ) and ) then ) ( we ( ' ( re off ) ) ) ) and ) ( ( ( running ( through ( all ( the bones ) ) ) ) , ) ( onto ( ( ( ( ( ( the ( muscular system ) ) , ) ( the ( nervous system ) ) ) , ) and ) ( the ( sensory organs ) ) ) ) ) ) . )
(ROOT (S (S (S (NP (DT The) (NN material)) (VP (VP (VBZ begins) (PP (IN with) (NP (NP (DT the) (NNS basics)) (PP (IN of) (NP (JJ anatomical) (NN positioning)))))) (PRN (-LRB- -LRB-) (S (VP (VBG knowing) (NP (PRP$ your) (NN anterior)) (PP (IN from) (NP (PRP$ your) (NN posterior))))) (-RRB- -RRB-)) (CC and) (VP (VBZ moves) (PP (TO to) (NP (DT the) (JJ skeletal) (NN system)))))) (, ,) (CC and) (RB then) (S (NP (PRP we)) ('' ') (VP (VB re) (PRT (RP off))))) (CC and) (S (VP (VBG running) (PP (IN through) (NP (PDT all) (DT the) (NNS bones))) (, ,) (PP (IN onto) (NP (NP (DT the) (JJ muscular) (NN system)) (, ,) (NP (DT the) (JJ nervous) (NN system)) (, ,) (CC and) (NP (DT the) (JJ sensory) (NNS organs)))))) (. .)))
The material begins with the basics of anatomical positioning (knowing your anterior from your posterior) and moves to the skeletal system, and then we'  re off and running through all the bones, onto the muscular system, the nervous system, and the sensory organs.
(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.