Nervous System

3. Nerve cells responsible for receiving external stimuli from the body's environment and passing that signal through nerves to the central nervous system.
5. Chemicals that assist in passing a signal through the synapse.
6. A medical doctor who interprets medical images to diagnose and treat diseases or injuries.
7. The long extension from a nerve cell along which signals travel.
8. An abnormal growth of tissue, whether cancerous or noncancerous
10. An area of an organ or tissue that suffered damage through injury or disease.
11. Diseases of the brain, spine, and nerves. They're also called nervous system diseases.
15. A clear, colorless liquid surrounding the brain and spinal cord.
16. A fatty substance that surrounds the axon and increases the speed at which signals travel.
18. The part of the nervous system that includes the brain and spinal cord.

1. Nerve cells that pass signals from the brain or spinal cord to a muscle or gland.
2. The part of the nervous system that includes nerves and is not part of the brain and spinal cord.
4. A branch extending from a neuron that receives signals from another neuron through a synapse.
9. Healthcare professionals who specialize in the imaging of human anatomy for the diagnosis and treatment of illnesses.
11. A nerve cell that sends signals or transmits nerve impulses.
12. Test that identifies nerve damage by measuring the electrical activity in muscles.
13. Technologies used to look inside your body for clues about a medical condition; includes X-rays, CT scans, nuclear medicine scans, MRI scans, and ultrasound.
14. The gap between the branches extending from a neuron's axon that sends a signal to the next neuron.
17. Nerve that runs down the back of the leg and branches out to the muscles of the foot.
19. A bundle of neurons.