Atria: Difference between revisions
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The atria (singular atrium) are the upper chambers in the [[Heart|heart]]. They are involved in the first stages of the cardiovascular cycle mediated by the Sinoatrial Node ([[SAN|SAN]]). A wave of depolarization sweeps over the the atria causing them to contract, which forces blood from the atria into the ventricles. | The atria (singular atrium) are the upper chambers in the [[Heart|heart]]. They are involved in the first stages of the cardiovascular cycle mediated by the [[Sinoatrial Node|Sinoatrial Node]] ([[SAN|SAN]]). A wave of depolarization sweeps over the the atria causing them to contract, which forces blood from the atria into the ventricles. | ||
Revision as of 18:37, 15 October 2012
The atria (singular atrium) are the upper chambers in the heart. They are involved in the first stages of the cardiovascular cycle mediated by the Sinoatrial Node (SAN). A wave of depolarization sweeps over the the atria causing them to contract, which forces blood from the atria into the ventricles.