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the structure and function of nervous system

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Introduction

The nervous system is a major system which controls and regulates communication system in the body. The nervous system is composed of organs such as the brain, spinal chord, nerves and ganglia. Also these consist of various tissues including nerve, blood and connective tissue. Together these all carry out the complex activities of the nervous system. The nervous system can be divided into two parts. a) Central nervous system: consists of the brain and spinal chord and all there nerves and organs which control the voluntary and involuntary acts e.g. breathing, moving the joints etc. I) The brain: is a large mass of soft tissue contained inside the cranium. ...read more.

Middle

Somatic nervous system: is part of the peripheral nervous system which is associated with the voluntary control of the bodies activities (movement) through action of skeletal muscles and the reception of external stimuli which helps the body keep in touch with its surroundings. ii) Autonomic nervous system: is part of the peripheral nervous system that acts as a control system below the consciousness and controls visceral functions. Functions of the nervous system: The nervous system has three main basic functions: (a) sensory neurons: receive information from the sensory receptors (b) Interneuron's: transfer and interpret muscles (c) Motor Neurons: send appropriate impulses and instructions to the muscles and glands. ...read more.

Conclusion

Certain long processes of the nerve cells are of special importance, and it is convenient to consider them apart from the cells; they are known as nerve fibers. Organs and their functions: Brain: is the center of the nervous system responsible for thinking and making decisions. Spinal chord: conducts sensorary information for PNS conducts motor information from the brain Eyes: provides vision Skin: mechanical barrier for touch Nose: sense of smell Ears: responsible for sensing and collecting sound Tongue: sense of taste Inner ear: helps maintain balance Diagram of nervous system: Test for Receptor Organs: Types of stimulus: Receptor Organs involved: Description: Still and vinegar nose Not nice, sour Baby powder nose Smell of baby lemon nose fresh Furry material Touch (skin) puffy Ceramic tile Touch (skin) Smooth, hard Sand paper Touch (skin) Rough, flexible Jerunium oil nose lavender - ...read more.

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