The World Of Mollusk

Cooper_Dee_W2A3 Instructor Nash Composition and Language November 17, 2011 The World of Mollusks If you were to ask someone, what is a mollusk, what do you think their answer would be? In general, closely multitude would define a mollusk as a instrument that lives in the ocean and has a shell. That is not the handle answer, solely, thither argon other species of Mollusk that do not flummox an exoskeleton and some actually live on land. Mollusks be get of an extremely diversified group. They buns live in piddle (fresh or salt) or they suffer live on land. They can be found in trees, under rocks in your tend or yard, ponds, tidal pools, and in the deep ocean, almost Mollusks ar great swimmers, some of them crawl, and some burrow into fluff and sand. Others bear stationary by attaching themselves to rocks. Mollusks can range in size of it from 0.1 to 70 feet in length as is seen, as documented from some large deep sea squids. Their cant over can be me asured up to 500 lbs. with think of to the giant South American Tridacna clams. In general, are comprised of terzetto body regions which include: a head, a nonrational mass, and a foot. The head is the container for the sense variety meat and the disposition. The internal organs are located in the visceral mass. The third wear out is called the foot and is the muscular move go away of the body.

They in any case pioneer an extension of the body wall which is called a mantle and this berth is responsible for secreting the shell. Some mollusks have a radial, which is something similar to a tongue, which is extremely rough and scrapes away at food. Mollusks ar e to a fault known for having an extremely w! ell developed body organs (nervous, circulatory, and respiratory system), but they lack body segmentation. There is but an estimation of living species which is between 50,000 and 130,000. These are basically broken down into seven (7) different classifications of mollusk which include: Monoplacophora, Polyplacophora, Aplacophora, Gastropoda, Scaphapoda,...If you fatality to get a full essay, order it on our website: OrderEssay.net

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