How to make Niagara Particle flow through mesh?

Hey guys, I’m trying to make a particle system where a particle travels from the heart to various body parts of my character like blood flowing through our body on every heartbeat. I can’t figure out how to set the pathing of the particle to go from the heart to the different body parts. I can’t find any tutorials for this and I’m new to this so please excuse me if the answer is really simple. Thank you.