( Shock ( ( is ( ( the ( severe condition ) ) ( that ( ( ( depresses ( body functions ) ) and ) ( can ( ( keep ( ( ( ( ( ( the heart ) , ) lungs ) , ) and ) ( other organs ) ) ) ( from ( working normally ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Shock)) (VP (VBZ is) (NP (NP (DT the) (JJ severe) (NN condition)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ depresses) (NP (NN body) (NNS functions))) (CC and) (VP (MD can) (VP (VB keep) (NP (NP (DT the) (NN heart)) (, ,) (NP (NNS lungs)) (, ,) (CC and) (NP (JJ other) (NNS organs))) (PP (IN from) (S (VP (VBG working) (ADVP (RB normally)))))))))))) (. .)))
Shock is the severe condition that depresses body functions and can keep the heart, lungs,  and other organs from working normally.
(ROOT (S (PP (IN In) (NP (PRP$ your) (NN body))) (, ,) (NP (NP (DT the) (NN heart)) (CC and) (NP (NNS lungs))) (VP (VBP work) (ADVP (RB together)) (S (VP (TO to) (VP (VB make) (ADJP (JJ sure)) (SBAR (IN that) (S (NP (NN oxygen)) (VP (VBZ gets) (PP (TO to) (NP (NP (PDT all) (DT the) (JJ other) (NNS organs)) (PP (IN of) (NP (PRP$ your) (NN body)))))))))))) (. .)))
In your body, the heart and lungs work together to make sure that oxygen gets to all the other organs of your body.