This is why boa constrictors can still breathe while squeezing the life out of prey

Snakes activate different sections of the rib cage, using far end of lungs as a bellows.

Python San Diego Zoo Animals & Plants

The Truth Behind a Snake's Deadly Embrace - The New York Times

Boa Constrictor Facts For Kids & Adults. Info, Pictures, Video.

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How boas save themselves from suffocation when constricting and

Why boa constrictors don't suffocate when they squeeze their prey

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How Does a Boa Constrictor Manage to Breathe While Squishing Prey

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Ars Technica

How boa constrictors squeeze and breathe at the same time