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Encyclopedia > Spiracles

Spiracles are small openings on the surface of animals that usually lead to respiratory systems.


In elasmobranchs (sharks, skates, and rays), a spiracle is found behind each eye, and is used to pump water through the gills while the animal is at rest (Fouts, 2003).


In insects and some more advanced spiders, spiracles allow air to enter trachea (Solomon et.al., 2002). However, unlike insects, tracheal tubes in spiders do not deliver oxygen to the animals tissues (Foelix, 1996). Instead the oxygen diffuses into the hemolymph (Foelix, 1996).


References

  • Fouts, William. April 2003. Marine Science Dept. Orange Coast College.
  • Solomon, Eldra, Linda Berg, Diana Martin. 2002. Biology. Brooks/Cole.
  • Foelix, Ranier. 1996. Biology of Spiders. Oxford U. Press

  Results from FactBites:
 
NationMaster - Encyclopedia: Spiracle (536 words)
In elasmobranchs (sharks, skates, and rays), a spiracle is found behind each eye, and is used to pump water through the gills while the animal is at rest (Fouts, 2003).
In the rays, the spiracle is much larger and more developed and is used to actively pump water over the gills to allow the ray to breathe while buried in the sand.
In elasmobranchs (sharks, skates, and rays), a spiracle is found behind each eye, and is often used to pump water through the gills while the animal is at rest (Fouts, 2003).
Spiracle - Wikipedia, the free encyclopedia (175 words)
Spiracles are small openings on the surface of animals that usually lead to respiratory systems.
In elasmobranchs (sharks, skates, and rays), a spiracle is found behind each eye, and is often used to pump water through the gills while the animal is at rest (Fouts, 2003).
A spiracle is also found in primitive bony fishes as the bichir.
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