A.V. node

[anamikariya]

Wht the atrioventricular node is also known as pacesetter?

[Gilby101]

I'm not going to try and be rude here, but how do you have questions that I have no clue about Since I'm not at a high enough level of education yet, but this is a grade 11 question quite frankly.
I'll be generous and sauce you an answer, it's the pace setter because it Delays the contraction of the ventricles to ensure that the atria have pumped its blood into them.
Don't ask a bunch of questions without showing that you atleast have some clue as to what you know