The Nervous System is divided into two parts. The Central Nervous System and the Peripheral Nervous System. 

     There are two main types of cells in the Nervous System. One of them is the Neuron. Neurons have dendrites, a cell body, and of course a nucleus. They also have an Axon, which sends impulses to the brain and other parts of the body. At the end of the Axon is the Axon Terminal. 

     There are two different types of neurons. There are Sensory Neurons and Motor Neurons. Sensory Neurons receive information from receptors which respond to heat, and light. Motor Neurons carry signals from the brain to the muscles to control movement. 

     In the Autonomic Nervous System is where they Autonomic nerves are. The Autonomic Nervous System is divided into three parts. There is the Sympathetic, the Parasympathetic, and the Enteric. 

     The Sympathetic Nervous System tends to act in opposition the parasympathetic nervous system. It speeds up the heart beat and causes the contraction of the blood vessels. It's activated especially under the condition of stress. The Parasympathetic nervous System slows down your heart rate, and dilates the blood vessels. 

The Brain also is divided into three sections. The Cerebrum, the Cerebellum, and the Medulla. 

The Cerebrum controls thought, voluntary movement, language, and reasoning. 

The Cerebellum controls balance, and coordinates body movement.

The Medulla controls breathing, heart rate, and blood pressure.