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Barnacle: Difference between revisions
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The digestive system is composed of the mouth, esophagus, stomach, small intestine and anus. The digestion process looks something like this: 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] | The digestive system is composed of the mouth, esophagus, stomach, small intestine and anus. The digestion process looks something like this: 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] | ||
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/] | |||
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The life process of a barnacle consists of three stages. The nauplius, the cyprid, and the adult stage.[http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | The life process of a barnacle consists of three stages. The nauplius, the cyprid, and the adult stage.[http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | ||
The first step of the process is fertilization. The barnacle will release sperm into the ocean through its penis. The sperm will travel until another barnacle consumes the sperm. When the sperm reaches another barnacle it is delivered to the mantle cavity to fertilize the eggs that are stored there.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | The first step of the process is fertilization. The barnacle will release sperm into the ocean through its penis. The sperm will travel until another barnacle consumes the sperm. When the sperm reaches another barnacle it is delivered to the mantle cavity to fertilize the eggs that are stored there. In some species the barnacle will extend its extremely long penis to another barnacle and inject the sperm to fertilize it.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | ||
The eggs will hatch as a nauplius: small larval creatures with one eye, two antennae, and several mandibles. [http://webs.lander.edu/rsfox/invertebrates/balanus.html] The nauplius will usually molt six times before it morphs into the next stage. It usually moults once before it is released from the mantle cavity and into the open ocean. [http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | The eggs will hatch as a nauplius: small larval creatures with one eye, two antennae, and several mandibles. [http://webs.lander.edu/rsfox/invertebrates/balanus.html] The nauplius will usually molt six times before it morphs into the next stage. It usually moults once before it is released from the mantle cavity and into the open ocean. [http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | ||
