"Have you ever choked on a bite of food that went down the "wrong pipe"? What does this mean, and what's the right pipe anyway? This book follows a bite of sandwich as it loops, swoops, swishes, and squishes through your entire digestive system." -- Back cover."Have you ever choked on a bite of food that went down the "wrong pipe"? What does this mean, and what's the right pipe anyway? This book follows a bite of sandwich as it loops, swoops, swishes, and squishes through your entire digestive system." -- Back cover.