There isn't any. You're thinking of the nervous system - but the messages are all chemical. The electrical activity is a side effect.
The nervous system
Neuron system
nervous system
Neurons are the cells that make up the nervous system.
The brain sends and receives messages, usually referred to as signals, to all parts of the body. The nerves scattered throughout the body help in accompolishing this.
The endocrine system
nerveous
It sends messages to your brain.
Neurons are the cells that make up the nervous system.
Both the nervous system and the endocrine system send messages to the brain
The brain is like the central control system of the body. The brain sends messages to and receives messages from other organs and systems.
Neuron
messenger neurons
The brain is like the central control system of the body. The brain sends messages to and receives messages from other organs and systems.
nerve cells...........
The brain sends and receives messages, usually referred to as signals, to all parts of the body. The nerves scattered throughout the body help in accompolishing this.
It delivers messages from the nervous system to the excretory system, APE
The brain.
The endocrine system
Sends and receives instant messages to and from other AOL and AIM users.