IMO, and I could be wrong, but the drive from Minn/St Paul, other than the Mall of America in Minneapolis, has nothing of interest until you get to the Badlands, Custer STate Park, Crazy HOrse, Mt Rushmore area. Deadwood SD for a day and night, I found to be of interest.
Sinoatrial node is located at the junction of the superior vena cava with the right atrium.
The events between the start of one hearbeat and the start of the next is called the. The sinoatrial node acts as the pacemaker of the heart because these cells are. After the SA node is depolarized and the impulse spreads through the atria, there is a slight delay before the impulse spreads to the ventricles.