You’re being needlessly pedantic
The reality is that they’re two hearts
If they were to be carefully separated, but with the SA & AV nodes still connected somehow (ignoring the fact that the Perkinje fibres and bundle of hiss can also act as pacemakers), you’d have two separate hearts doing their thing
AbouBenAdhem@lemmy.world 4 days ago
Even if they were physically separated you’d want them to pump in sync, to maximize the pressure. So having them share electrical signals is just the optimal setup for two hearts.
HeyThisIsntTheYMCA@lemmy.world 4 days ago
you want to maximize flow, not pressure. maximizing pressure is a great way to die of stroke.
AbouBenAdhem@lemmy.world 4 days ago
Not absolute pressure, but pressure per unit of work (i.e., efficiency).