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Describe theories to account for the belt-zone circulation on Jupiter.
SA Node
Sinoatrial node, a group of cells located in the right atrium of the heart that generates electrical impulses to start each heartbeat.
Afterload
The pressure the heart must work against to eject blood during systole.
Extracellular
Located or occurring outside of a cell or cells, often referring to the fluid, substances, or cellular components in the space outside cells.
Heart Rate
The number of heartbeats per unit of time, usually measured in beats per minute (bpm).
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