This book cover image released by W. W. Norton & Company shows "Gulp: Adventures on the Alimentary Canal," by Mary Roach. (AP Photo/W. W. Norton & Company)
This book cover image released by W. W. Norton & Company shows "Gulp: Adventures on the Alimentary Canal," by Mary Roach. (AP Photo/W. W. Norton & Company) ASSOCIATED PRESS
This book cover image released by W. W. Norton & Company shows "Gulp: Adventures on the Alimentary Canal," by Mary Roach. (AP Photo/W. W. Norton & Company) ASSOCIATED PRESS

In 'Gulp,' author makes it fun, easy and sometimes gross to learn all about digestion

April 11, 2013 08:45 AM

UPDATED April 11, 2013 09:28 AM

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