In your gut is the "second brain"

You have 100 million neurons along the way from the esophagus to the anus. In fact, the digestive system comprises nerve cells longer than the spinal cord. Scientists call it a cluster of neurons in the enteric nervous system.

"Second brain" in the digestive tract is not able, of course, to thinking and mainly deals with digestion, but some signs of "consciousness", he still shows. For example, "butterflies in the stomach" when you're in love or feeling of tightness in the stomach when nervous - is the work of the enteric nervous system. It is also responsible for the fact that the sharp stress leads to loss of appetite.

via factroom.ru