The Lung Ventilation Mechanism in Boa Constrictors

In order to do this sort of behavior, that had to evolve for them to be able to do that in the first place. The feedback of being able to breathe a little bit better allows you to maybe constrict something a little bit bigger and then eat something a littlebit bigger. It's like me eating a cheeseburger that weighs 180 pounds in one bite. That would be really difficult if you couldn't already breathe while doing it.