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23 July, 07:06

How blood and cardiovascular, respiratory, and nervous systems contribute to muscle contraction

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  1. 23 July, 07:59
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    I know for a fact that the Nervous System has a major role in it. When you bend your arm, signals are sent to your brain, basically saying "hey this part of the body needs to move this way" and then signals from the brain are sent back to the arm telling it to bend (which contracts one of the muscles in your arm). If it weren't for the nervous system, you wouldn't be able to move because those signals wouldn't be sent to the brain and back to the muscles.

    I'm not quite sure for the other three though.
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