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 Introduction to sences

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Maria Nader
THE JOKER
THE JOKER
Maria Nader


Female
Age : 27
Location : Hamidieh Main Street
Job/hobbies : Drawing and painting
Points : 198
Registration date : 2008-11-28

Introduction to sences Empty
PostSubject: Introduction to sences   Introduction to sences EmptyTue Mar 02, 2010 5:34 am

What's that smell? Do you hear that noise? Taste this! Look at me! Feel this, isn't it soft? When you hear, or even use these phrases, you probably don't stop to think about why we use them. Well, it's because of our senses. Without us even knowing, our sense organs (nose, eyes, ears, tongue, and skin) are taking in information and sending it to the brain for processing. If we didn't have them, we would not be able to smell, see, hear, taste, or touch anything! Talk about a boring life.

Our senses are the physical means by which all living things see, hear, smell, taste, and touch. Each sense collects informaton about the world and detects changes within the body. Both people and animals get all of their knowledge from their senses, and that is why our senses are so important.

All senses depend on the working nervous system. Our sense organs start to work when something stimulates special nerve cells called receptors in a sense organ. We have five main sense organs. They are the eyes, nose, ears, tongue, and skin. Once stimulated, the receptors send nerve impulses along sensory nerves to the brain. Your brain then tells you what the stimulus is. For example, your sound receptors would be bombarded by billions of sound waves. When these signals reach the part of the brain called the cerebral cortex, we become conscious of the sounds. If you need to have a better overview of the nervous system,
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