Health, 03.04.2020 15:24, naomicervero

As the heartbeat begins, a positive electrical charge spreads across the cell membranes and then there is a sudden change where the heart will send itself a negative charge that makes it contract. The heart’s electrical change from the positive to the negative state is one heartbeat. *
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As the heartbeat begins, a positive electrical charge spreads across the cell membranes and then the...