Question

why enteric nervous system called as second brain
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Answer 1

Answer:

motor nerves is also called the second brain

Answer 2

The enteric nervous system (ENS) is known as the "second brain" or the brain in the gut because it can operate independently of the brain and spinal cord, the central nervous system (CNS). It has also been called the "first brain" based on evidence suggesting that the ENS evolved before the CNS. Despite the known role of the ENS in generating motor activity in the colon, observing ENS neurons in action has been a challenge.