Wat is the SA nod?!
Question:
Wat is the SA nod?
Answers:
The heartbeat (heart rate) is normally governed by the frequency of electrical signals which are generated by the heart's natural pacemaker called the SA node. The SA node is located on the wall of the right atrium. Electrical signals from the SA node travel along special conduction tissues on the walls of the atria, causing the atria muscles to contract and pump.
Click these links for more info:
http://www.reference.com/browse/wiki/sin...
http://www.medicinenet.com/pacemaker/art...