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Discuss how the series and parallel systems function together as a series-parallel circuit in your analogy.
while the organs are the parallel circuits the blood paths are the series circuits. The blood starts at the heart and gets sent throughout the body and back to the heart. The blood also goes to the organs in order to allow them to go through the process that they need to do. As the blood also goes through the organ it continues on until the veins turn around and bring the blood back to the heart.
