How does a grain of corn survive our digestive system?
The body cannot break down corn kernels
The husk of a corn kernel consists of tough fibers, which you also find in the skin of beans, peas and tomatoes. They are made of cellulose, the main component of cotton and wood, for example.
Our digestive system has no enzymes to break down cellulosic fibers, and therefore the body cannot digest the grain of corn and it comes out completely.