Difference between revisions of "Vestigial Structures"

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Vestigial organs are organs that do not seem to have a function. Examples include rear legs in some snakes<ref>[http://www.esconi.org/Karen_Komments_PDF/KK6-June2006.pdf Report on fossil snake with lizard-like features and legs]</ref>,<ref> [http://www.edwardtbabinski.us/images/spurs1.jpg Photo of python's rear leg stumps]</ref> and whales<ref>[http://www2.ucsc.edu/seymourcenter/PDF/3.%20Whale%20Skeleton%20Activity.pdf Diagram of blue whale skeleton, showing "leg" bones]</ref>, the appendix in humans<ref>[http://www.medicinenet.com/appendicitis/article.htm Diagram of appendix and information on appendicitis]</ref>, and wings in flightless birds such as ostriches or kiwi <ref>[http://www.chem.cmu.edu/groups/Collins/about/kiwi.html Kiwi information page]</ref>.
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Vestigial organs are organs that do not seem to have a function. According to Dr. [[Jerry Bergman]] the list of [[vestigial organs]] in humans has gone from 180 in 1890 to 0 in 1999.<ref>http://www.answersingenesis.org/tj/v14/i2/vestigial.asp</ref> Furthermore, Dr. Bergman states the following:
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{{cquote|Few examples of vestigial organs in humans are now offered, and the ones that are have been shown by more recent research to be completely functional (and in many cases critically so, see Bergman and Howe)...
  
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Vesitigial organs, are claimed to be strong evidence in favor of evolution - ostriches, for instance, would be claimed to have evolved from a flying ancestor which no longer needed to fly, and so in subsequent generations the wings shrunk until they were no longer capable of flight, thus helping the bird survive by requiring less food and energy.
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One popular book on the human body which discussed vestigial organs stated that next to [[circumcision]]
  
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Creationists usually claim that vestigial organs aren't really useless at all - for instance, in ostriches the wings might be used for balance or sexual display. However, it is hard to extend this explanation to internal leg bones in right whales, or the near-invisible wings of the kiwi.<ref> [http://www.savethekiwi.org.nz/NR/rdonlyres/1BF57624-0105-41DB-BBFD-4BFEC7C2E62C/0/rc12_wing.jpg Photo of kiwi wing stump] </ref> , <ref> [http://www.tepapa.govt.nz/wings/IMAGES/kiwi.jpg Photo of kiwi showing no visible wings] </ref>.
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‘… [[tonsillectomy]] is the most frequently performed piece of surgery. Doctors once thought [[tonsils]] were simply useless evolutionary leftovers and took them out thinking that it could do no harm. Today there is considerable evidence that there are more troubles in the upper respiratory tract ''after'' tonsil removal than before, and doctors generally agree that simple enlargement of tonsils is hardly an indication for [[surgery]]...’<ref>http://www.answersingenesis.org/tj/v14/i2/vestigial.asp</ref>}}
 
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[[category:biology]]
 
[[category:biology]]

Revision as of 21:33, September 24, 2007

Vestigial organs are organs that do not seem to have a function. According to Dr. Jerry Bergman the list of vestigial organs in humans has gone from 180 in 1890 to 0 in 1999.[1] Furthermore, Dr. Bergman states the following:

“ Few examples of vestigial organs in humans are now offered, and the ones that are have been shown by more recent research to be completely functional (and in many cases critically so, see Bergman and Howe)...

One popular book on the human body which discussed vestigial organs stated that next to circumcision

‘… tonsillectomy is the most frequently performed piece of surgery. Doctors once thought tonsils were simply useless evolutionary leftovers and took them out thinking that it could do no harm. Today there is considerable evidence that there are more troubles in the upper respiratory tract after tonsil removal than before, and doctors generally agree that simple enlargement of tonsils is hardly an indication for surgery...’[2]

”

References

  1. ↑ http://www.answersingenesis.org/tj/v14/i2/vestigial.asp
  2. ↑ http://www.answersingenesis.org/tj/v14/i2/vestigial.asp
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