system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do desert lizards/snakes not suffocate when they bury themselves in sand?

Do they have some sort of special breathing they do? Or do they have membranes around their nose or mouth that prevent sand from getting in?
gpt
They do not completely encase themselves in sand. They make enough room for them to move a bit and allow an open area for air to get to. They do not require that much air, so the amount that seeps in from the space between the sand is enough to replenish oxygen supply.