What is the difference between inversion and passive voice?

Passive voice is more an inversion of meaning than an inversion of syntax. That's because the grammatical subject of the sentence (heart) is still at the beginning of the sentence and is still followed by the verb. In other words, standard subject + verb order prevails.

different routes can lead to sammy to different places, with different roads.   if you check a map, you can see the routes.   try to make connections of the places and count how many there are.   hope this : )