nervous system

6. largest part of brain.
7. an organized network of billions of specialized cells called ________.
10. sneezing when an unwanted particle enters the nose is an example of __________.
11. it maintains the balance of the body.
12. a neuron has three parts :cell body, dendrites and _____ .
14. the ridges and ______ increase the surface area to accommodate more nerve cells.
15. the nerve pathway of a reflex action is called ________.
17. junction where communication between two neurons occurs.
18. central nervous system consists of _____ and spinal cord.
19. the spinal cord is the continuation of ____________ of the brain.

1. reaction of the organism to a stimuli is called ______.
2. organs or muscles that respond after receiving impulse from the brain or spinal cord.
3. messages travel along nerve cells in the form of a wave of chemical disturbance is called _____.
4. structural and functional unit of nervous system.
5. peripheral nervous system consists of cranial and _____ nerves.
7. it is the organ system that brings about coordination and integration of different body activities is called the _______________.
8. many short fibres in nerve cell.
9. small canal in the centre of spinal cord.
13. a group of special cells that receive the stimulus from environment.
16. these nerves arise from the brain and reach organs in the head region.