Also known as: SA+, SA/
SA has various meanings in the Physiology category. Discover the full forms, definitions, and usage contexts of SA in Physiology.
The sinoatrial node is a group of cells positioned on the wall of the right atrium, near the entrance of the superior vena cava. These cells are specialized cardiomyocytes. Though they possess some contractile filaments, they do not contract robustly.
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