Wednesday, Apr 17, 2013 -- 10:00 AM
How does saliva work? Why doesn't your stomach digest itself? And did constipation really kill Elvis? In her new book "Gulp: Adventures on the Alimentary Canal," Mary Roach chronicles the surprisingly exciting journey that food undertakes in the human body. Roach joins KQED's Forum to talk about everything you ever wanted to know -- or might be disgusted to know -- about the digestive process.
Host: Michael Krasny