In one of my classes i learned its easier for humans to choke then for animals. Over evolution as people where able to talk and make sounds to make words our larnix moved, and we deveoped two tubes in our throut. and its easier for humans to choke because of it. that our tubes are arnt connected. The phrase if have you kinda choke "i swallowed down the wrong tube" animals have 1 tube hence not being able to talk (other then a bark or a meow), and its not touching their larnix but humans have 2 thats why its easier for us to choke. I will need to make sure this is true its in one of my text books but i think thats fairly right or close anyway. This is why humans have a higher chance of chokeing.