Rare card
Sinoatrial node
- Value
- 50 W
- Attack
- 256
- Defence
- 205
- Players
- 0
The sinoatrial node (also known as the sinuatrial node, SA node, sinus node or Keith–Flack node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made of pacemaker cells.
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