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Barnacle: Difference between revisions
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[http://en.wikipedia.org/wiki/Barnacle] | [http://en.wikipedia.org/wiki/Barnacle] | ||
Immediately inside the Barnacle are six legs, or cirri, that are used for | Immediately inside the Barnacle are six legs, or cirri, that are used for three purposes. These legs are used for filter feeding, are the main source of response, and they are used for respiration in class cirripedia.[http://www.waterencyclopedia.com/Ce-Cr/Crustaceans.html] When used for feeding the legs are extended into the water by the barnacle in order to catch whatever food it can. The legs are then retracted and whatever particles the legs have caught are brought to the mouth. They are also used as the sensory organs of the Barnacle. The tiny sensory hairs on the cirri detect danger and water level in order to tell the creature whether to open or close the two calcereous plates at the top.[http://invertebrates.si.edu/crustaceans.htm] [http://www.cb1.com/~john/research/barnacle.html] | ||
After the Barnacle's cirri feed the food to the mouth it goes down a short esophagus. After flowing through the esophagus it ends up in the stomach, where it is stored for some time. It then goes down the small intestine where the nutrition is absorbed. After the nutrition is absorbed the waste is then excreted out the anus, which is then filtered back out into the ocean.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | After the Barnacle's cirri feed the food to the mouth it goes down a short esophagus. After flowing through the esophagus it ends up in the stomach, where it is stored for some time. It then goes down the small intestine where the nutrition is absorbed. After the nutrition is absorbed the waste is then excreted out the anus, which is then filtered back out into the ocean.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | ||
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barnacles also have two antennules that secrete a cement-like glue that they use to attach themselves to rocks, boats ,and many other surfaces. The glue is secreted by cement glands located inside of the barnacle.[http://museumvictoria.com.au/discoverycentre/infosheets/how-do-barnacles-cement-themselves-to-rocks/] | barnacles also have two antennules that secrete a cement-like glue that they use to attach themselves to rocks, boats ,and many other surfaces. The glue is secreted by cement glands located inside of the barnacle.[http://museumvictoria.com.au/discoverycentre/infosheets/how-do-barnacles-cement-themselves-to-rocks/] | ||
