The structure that carries messages between the brain and the other parts of the body.

Short strands branching out from the cell body of the neuron.  They bring messages into the cell body.

One of the three types of neurons. They serve as links, or connectors, between the sensory neurons and the motor neurons.  They are found in the spinal cord and the brain.

The message that travels through the neuron.

The path of an impulse: (1) received by the dendrites, then (2) travels to the cell body, then (3) moves to the axon, and then (4) crosses the synapse to enter the dendrite of the next neuron in order to repeat the process.

It controls the body's reactions to the outside world. It controls the actions, emotions, thoughts, memories, sesations, and senses.

One of the three main parts of the brain. It is the part of the brain that controls balance, posture, complex movements, and muscle coordination.

One of the three types of neurons. These neurons carry impulses from your senses (hearing, seeing, tasting, feeling, and smelling) to your spinal cord and brain.

Events or conditions that cause a living thing to react.

The single, long strand that comes out of the other end of a neuron's cell body. (On the other side are the dendrites.) It carries messages away from the cell body and toward the next neuron.

One of the three main parts of the brain.  It is the largest part and has 2 hemispheres (sides).  This is the part of the brain that controls learning, memory, and reasoning. It also controls the muscles.

It is composed of the brain and the spinal cord. Damage to neurons in the CNS will not repair themselves. This is the area damaged when someone becomes a paraplegic (cannot move/use their legs).

The main part of the neuron. On one end is the axon and on the other end are the dendrites.

It is made up of the nerves that branch from the brain and spinal cord to the rest of the body.

The main control center of the nervous system. It is protected by the skull.

In an adult, it weighs about 3 pounds and has billions of neurons.

A quick, automatic response to a stimulus. They do not involve the brain.

One of the three main parts of the brain. It controls the functions necessary for life, such as heart beat, breathing, and blood pressure.

A gap between two neurons.

One of the three types of neurons. They carry impulses from the brain or spinal cord out to the other organs.

Nerve cells, which carry messages throughout the body.