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Biology 9 Online
OpenStudy (happykiddo):

What body part is necessary for the endocrine system to respond to stimuli?

OpenStudy (anonymous):

Brain? The endocrine system is very complex, with many parts - is there one system in particular you're studying?

OpenStudy (happykiddo):

oh i already got the answer it would be the circulatory system (blood stream to be exact)

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