Mouth of a Cucumaria miniatawith dendritic tentacles, for filtering the water. A few genera, such as Sphaerothuriaretain relatively large plates, giving them a scaly armour. Faeces of an holothurian. In most sea cucumbers, this is the only substantial part of the skeleton, and it forms the point of attachment for muscles that can retract the tentacles into the body for safety as for the main muscles of the body wall.
The body ranges from almost spherical to worm-like, and lacks the arms found in many other echinoderms, such as starfish. Depending on the species, sea cucumbers have between ten and thirty such tentacles and these can have a wide variety of shapes depending on the diet of the animal and other conditions.
Holothurians appear to be the best adapted Sea cucumber essay to extreme depths, and are still very diversified beyond 5, m deep: Inside the body wall is the coelom which is divided by three longitudinal mesenteries which surround and support the internal organs.
Only one species is known as a true completely pelagic species, that never comes close to the bottom: The anterior end of the animal, containing the mouth, corresponds to the oral pole of other echinoderms which, in most cases, is the undersidewhile the posterior end, containing the anus, corresponds to the aboral pole.
They are known as the introvert and posterior to them there is an internal ring of large calcareous ossicles.
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Gas exchange occurs across the thin walls of the tubules, to and from the fluid of the main body cavity. An additional form of coelomocyte, not found in other echinoderms, has a flattened discoid shape, and contains hemoglobin. Other species can dig into bottom silt or sand until they are completely buried.
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The ambulacral grooves bear four rows of tube feet but these are diminished in size or absent in some holothurians, especially on the dorsal surface. Please help improve this section by adding citations to reliable sources.
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This participates in sediment homogenization and purification. There are also circular muscles, contraction of which cause the animal to elongate and the introvert to extend. Additional vessels surround the respiratory trees, although they contact them only indirectly, via the coelomic fluid.
Communication and sociability[ edit ] This section does not cite any sources. Exceptions include some pelagic cucumbers and the species Rynkatorpa pawsoni, which has a commensal relationship with deep-sea anglerfish.Sea Cucumber Essay Report SEA CUCUMBER The ubiquitous holothurian, or the sea cucumber, is an echinoderm, a species like sea urchins and starfish.
The sea cucumber has about 1, species worldwide. The sea cucumber’s body is like a cucumber, but some look spiky and have lots of different colors and patterns on their skin. Sea cucumbers live on the ocean sand, and they may hide under the ocean floor, if they want to.
In Japan, sea cucumber is also eaten raw, as sashimi or sunomono, and its intestine is also eaten as konowata, which is salted and fermented food (a variety of shiokara).
The dried ovary of sea cucumber is also eaten, which is called konoko (このこ) or kuchiko (く. - 1 SEA CUCUMBER IN MEDICAL APPLICATION INTRODUCTION Sea cucumbers from class of Holothuroidea are a group of echinoderms that include about 1, known living species.
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Anti-viral and Anti-cancer Effect of Sea Cucumber Extracts. Print Reference this. Published: 19th January The Anti-viral and Anti-cancer effect of secondary metabolite extracts from sea cucumber If you are the original writer of this essay and no longer wish to have the essay published on the UK Essays website then please click on the.
One of Australia's oldest fisheries is the collection of sea cucumber, harvested by divers from throughout the Coral Sea in far North Queensland, Torres Straits and Western Australia.
In the late s as many as divers operated from Cook Town, killarney10mile.comlum: Echinozoa.Download