Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

							1
					2							3			4		5
				6
7												8
			9								10
		11
															12
								13
14
			15
16
			17

 Check 

Across: 3. Neuron fiber that conducts signal away from cell body 6. Neuron that conducts signal to spinal cord 8. Conducting cells of nervous system 11. Produces myelin sheath in PNS 13. Non-conducting cells that insulate and support 14. Chemical messenger of synapse 15. Contacts brain capillaries, forms barrier to large blood molecules 16. Connective tissue covering of nerve 17. Membrane covering of neuron fiber.

Down: 1. Division includes brain and spinal cord 2. Neuron fiber conducts signal toward cell body. 4. Bundle of axons and dendrites 5. Communication junction between neurons 7. Enlarged area of nerve where synapses occur 9. Occurs when sodium ions enter axon through channels in membrane 10. Neuron that conducts from brain to muscle 12. Phagocytic cell of the brain 16. Division includes cranial and spinal nerves