What are the three groups of nerves?

The three main groups of nerves in the body are:

1. The Central Nervous System (CNS): This consists of the brain and the spinal cord. The brain is the control centre of the body, and the spinal cord is the main trunk that connects the brain to the rest of the body.

2. The Peripheral Nervous System (PNS): This consists of all the nerves that branch out from the CNS to the rest of the body. The PNS is further divided into two parts:

- The somatic nervous system: which controls voluntary movements, such as walking, talking, and writing.

- The autonomic nervous system: which controls involuntary functions, such as breathing, digestion, and heart rate.

3. The Enteric Nervous System (ENS): This is a network of nerves that controls the digestive system. The ENS is often called the "second brain" because it can function independently of the CNS.