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

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

Enlarge/ Brown University biologists X-rayed boa constrictors to determine how they manage to breathe while squeezing prey to death. 28 with 22 posters participating Watching a boa constrictor cap… [+6436 chars]

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