Question

what is ment by second brain??

Answer 1

The “second brain” or enteric nervous system (ENS) is a network of around half a million nerve cells and neurons (about the same amount as the brainof an adult cat) in the gut wall, responsible for controlling the gastrointestinal system.

Answer 2

The second brain known as the enteric nervous system consists of sheaths of neurons embedded in the walls of the long tube of your gut, or alimentary canal, which measures about nine meters end to end from the esophagus to the anus. The enteric nervous system contains some 100 million neurons, more than in either the spinal cord or the peripheral nervous system
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