eli5: Why is it that a heart beats in pairs of beats?
In: 3
It’s how the heart is “designed” so to speak. The smaller first beat moves the blood into the ventricles, which are the bigger chambers. Then the second beat is the muscle around those bigger chambers sending the blood down the arteries. After the big beat it takes a moment to recover and take in what is going to be the next pulse.
To compare it to something, you could use a slingshot. The first beat is pulling the shot back, and the big beat is letting it fly.
Latest Answers