The Heart Valves: Perfect Gates That Never Stop Working

Precision Flaps: Four valves keep blood flowing one-way through the heart.
Timing Masters: They open and close with every beat—about 100,000 times daily.
Pressure Driven: Each valve responds to tiny pressure changes in milliseconds.
Backflow Blockers: They prevent even a drop of blood from reversing direction.
Natural Design: Their flexible leaflets last decades without repair.
Sound Makers: The familiar “lub-dub” heartbeat comes from valve closure.
Built-In Sync: Valves coordinate perfectly with heart muscle contractions.
Silent Strength: Even slight valve damage can echo through the entire body.
Surgical Marvel: Artificial valves can mimic the real ones almost flawlessly.
Endurance Icons: They open and close more than 3 billion times in a lifetime.