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EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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All in Vivo Cells > Cell Card
Heart
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Sinoatrial Node
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Sinoatrial Node Cells (SAN)


Hrt.SAN.SNCs

Sinoatrial node cells have elongated nuclei, moderate amounts of myofibrils and an abundance of glycogen. These cells are smaller than working atrial myocytes, because they are spindle shaped and form parallelly-aligned bundles along the crista terminalis.

Prenatal
SA Nodal cells, primary pacemaker
Myocardium
Sinoatrial Node Cells
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent