may carry parasites

Member 165

Level 22.05

Mar 2006

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Mar 4, 2006, 08:59 AM
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#5 of 102
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Originally Posted by NovaX
How do cats purr? More importantly, why do cats purr?
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I was kind of surprised I could find this, but:
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How felines purr
Cats produce the purring noise by vibrating their larynx, or voice box, in a particular manner. They have a timing mechanism in the brain which sends neural messages to a muscle in the larynx, rhythmically opening and closing the air passage several times per second. Combined with the steady inhalation and exhalation of air as the cat breathes, a purring noise is produced.[1]
Cats can either purr or roar, one exception being the tigers which can purr but only in one direction. In general, small cat species purr, while larger ones roar, although pumas and cheetahs purr and do not roar
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Also,
Quote:
Why felines purr
Humans usually interpret the purring of a domestic cat as an expression of some type of friendliness or contentment. This assumption is based on the observation that cats often (though not always) purr when being stroked by humans, combined with the experience that human children tend to enjoy stroking by their parents and interpret it as a gesture of affection. Consequently, most humans enjoy listening to or holding a purring cat.
It is, however, not entirely clear to scientists whether this really is one of the cat's reasons for making the sound; it is well established that a cat also purrs when it is uneasy, nervous or in great pain, perhaps to comfort itself or to express submission. Other theories suggest that a cat purrs when it wants, needs, or is receiving attention, whether it be affection or medical treatment. Purring may also reduce pain, help a wounded cat to heal, or even help to keep a cat's bones strong[3].
Ethologist Paul Leyhousen, in his book Cat Behavior, interprets purring as a signal meaning "I am not a threat" to explain the otherwise differing circumstances that elicit the sound.
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I was speaking idiomatically.
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