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What does your stomach look like from the inside?
Michael Mosley has a camera pushed up his nose and into his stomach to find out what's going on inside. It reveals a strange world - a dark cavern, filled with caustic acid, which pulsates and writhes as it breaks down his meal of steak and chips.
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More clips from Guts: The Strange and Mysterious World of the Human Stomach
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What's going on in your guts?
Duration: 01:32
