Digestion is how we take life from other things and incorporate it into our own.
The large molecules which composed others are broken down into small ones.
That will be assembled into large ones, creating new life in our human bodies.
Why the stomach never digest itself, and why the stomach digests only food?
Let’s see details of the digestion process.
When we look at the digestive tract, we recall evolution of creatures. The digestive tract, called second brain, may be the first home of our mind.