How does the human heart pump blood around the body?
The Tireless Pump
How does the human heart pump blood around the body?
Right now, tucked behind your ribs, there's a muscle the size of your fist that has never once taken a day off. It started squeezing before you were born, and it hasn't stopped since. Meet the heart — the busiest little pump you'll ever own.
Here's the thing most people get wrong: the heart isn't really one pump. It's two pumps stuck together, working side by side. One side handles a short trip. The other handles the long haul. Together they keep your blood moving in a giant, never-ending loop.
