What does “Myogenic heart and the SAN” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
the sino-atrial node, a patch of heart muscle, is the pacemaker that starts each heartbeat on its own.
In simple words: the sino-atrial node, a patch of heart muscle, is the pacemaker that starts each heartbeat on its own. Getting Myogenic heart and the SAN clear matters because NEET questions on Body Fluids and Circulation usually test this idea directly, not just a formula you memorised.
Key point
Myogenic heart and the SAN
Common mistake
thinking the brain fires every heartbeat.
Memory tip
SAN = the heart's built-in pacemaker, so an isolated heart still beats.
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