NERVOUS SYSTEM

COORDINATION

It is the process through which two or more organs of an organism interact and complement the functions of each other or work together to adjust the vital activities of life.

NEED OF NERVOUS SYSTEM

1. To enable us to remeber, think and reason.
2. To coordinate working of various glands or tissues.
3. To regulate in voluntary activities of breathing , alimentary canal etc.
4. To regulate voluntary muscular activities.
5. To respond to changes in internal as well as external environment.

ROLE OF RECEPTORS

These are sensory cells that receive stimulus nad cinvert them into electric nerve impulses. The receptors are also called transducers as they convert one form of energy to another.
Examples

1. Photoreceptors in eyes
2. Phonoreceptors in internal ears
3. Olfactoreceptors in nose
4. Gustatoreceptors cin tongue
5. Mechanoreceptors in skin