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Articles by SM Bakhtiar |
741. Now do we talk
May 25, 2013
Now do we talk?
The ability of man to speak is due a great deal to the way in which the larynx is made. This is a hollow organ, shaped something like a box. It is really an enlarged part of the windpipe. The walls of this "box" are made of cartilage and they are lined inside with mucous memb...
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742. Are all fingerprints different
May 25, 2013
Are all fingerprints different?
In movies, TV shows, plays, and books, there are often situations in which a person leaves a fingerprint on something-and is later caught as a result of it. A fingerprint is considered positive proof-a mistake is impossible if a person has left his fingerprin...
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743. What are fingernails made of
May 25, 2013
What are fingernails made of?
If every time you bit your nails you suffered pain, you'd probably never bite them. Or for that matter, if it hurt us to cut our nails there would be a great many people with very long nails!
But cutting, biting, filing our nails don't hurt us ...
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744. Can shock cause grey hair
May 25, 2013
Can shock cause grey hair?
The answer to this question is yes. But strangely enough, how and why shock and nervous disorders because, grey hair is stilled something that cannot be entirely explained. We still don't even have a full explanation as to why old age brings on grey hair! But let's...
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745. Why are there different types of hair
May 25, 2013
Why are there different types of hair?
The kind of hair you have is a matter of inheritance. But the question is: Why are there so .many different types of hair that might be inherited? The general structure of the hair varies very little among human beings. But its form, its color, its gene...
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746. How are teeth formed
May 25, 2013
How are teeth formed?
One way to learn about things as they are today is to go back to their beginnings. Now maybe you've never thought of going far, far back to discover something about your teeth, but here is what happens if you do.
The human tooth is actually a transfor...
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747. What causes deafness
May 25, 2013
What causes deafness?
We should never make fun of people who are deaf or hard-of-hearing. They are suffering one of the greatest misfortunes that can happen to anyone. Just imagine how much of the beauty and joy of life they are forced to miss!
Deafness and hard-of-hearing...
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748. How does the ear work
May 25, 2013
How does the ear work?
The ear is one of the most wonderful instruments in our body. Without our having to do any "tuning," it can pick up the tiny tick of a watch one moment and the roar of an explosion the next.
The ear, however, is not the only thing we need to be able t...
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749. What is color-blindness
May 25, 2013
What is color-blindness?
All the colors can be made by mixing three primary colors: red, green, violet, or yellow, blue, and red. For instance, the colors of flowers are created by combinations of granules of pigments having the three primary colors-of red, blue, and yellow.
Becaus...
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750. How do we see color
May 25, 2013
How do we see color?
When a camera takes a color photograph, this is a physical process. But when we "see color," we are really having a psychological experience! The eyes receive an impression but do not "see." It is the brain that sees. So when the image is brought to the brain, the brain ...
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