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Barnacle: Difference between revisions
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== Anatomy == | == Anatomy == | ||
There are several parts that make up a barnacle. The outermost layer of a barnacle is its shell. The shell of the adult barnacle is usually composed of four to eight Calcereous plates which form a shape that resembles a triangle with a hole at the top.[http://www.mesa.edu.au/friends/seashores/barnacles.html] This hole is also covered by two calcereous plates which can pull back to reveal | There are several parts that make up a barnacle. The outermost layer of a barnacle is its shell. The shell of the adult barnacle is usually composed of four to eight Calcereous plates which form a shape that resembles a triangle with a hole at the top.[http://www.mesa.edu.au/friends/seashores/barnacles.html] This hole is also covered by two calcereous plates which can pull back to reveal the inside of the barnacle.[http://museumvictoria.com.au/crust/barnbiol.html] These plates will grow and expand by adding more material to itself. | ||
[http://en.wikipedia.org/wiki/Barnacle] | [http://en.wikipedia.org/wiki/Barnacle] | ||
Immediately inside the Barnacle are legs, or cirri, that are used for two purposes. These legs are used for filter feeding and are the main source of response in class cirripedia. 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. They detect danger and water in order to tell the creature whether to open or close the two calcereous plates at the top. [http://www.cb1.com/~john/research/barnacle.html] | Immediately inside the Barnacle are six legs, or cirri, that are used for two purposes. These legs are used for filter feeding and are the main source of response in class cirripedia. 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. They detect danger and water in order to tell the creature whether to open or close the two calcereous plates at the top. [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] | ||
