The heart is a finely tuned chemical-electrical balancing act that happens 3 billion times over a lifetime, translating electrical language into mechanical action through a high-stakes microscopic dance.
Создано выпускниками Колумбийского университета в Сан-Франциско
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Создано выпускниками Колумбийского университета в Сан-Франциско

Lena: You know, I was thinking about how much we rely on our technology to stay "on" all the time, but it’s nothing compared to the human heart. I mean, it’s this muscular organ about the size of a fist that beats over 100,000 times every single day without ever taking a break.
Miles: It really is the ultimate endurance machine. Most people think of it as just a simple pump, but it’s actually more like a sophisticated biological circuit board. It has its own internal electrical system that tells the muscle exactly when to contract, which is why it can actually keep beating independently of the brain.
Lena: That is wild! So it’s essentially self-powered?
Miles: Exactly. It uses specialized pacemaker cells to generate its own rhythm, 60 to 100 times a minute, through a complex conduction system. Let’s dive into how these electrical signals actually coordinate those four chambers to keep our blood moving.