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| Utilitarian ethical theory definition | Sea cucumbers are echinoderms from the class digitales.com.au are marine animals with a leathery skin and an elongated body containing a single, branched digitales.com.au cucumbers are found on the sea floor worldwide. The number of holothurian (/ ˌ h ɒ l ə ˈ θj ʊər i ə n, ˌ h oʊ-/) species worldwide is about 1, with the greatest number being in the Asia Pacific region. A machine is a man-made device that uses power to apply forces and control movement to perform an action. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement. Faster production without human intervention can mean faster unchecked production of defects where automated processes are defective. Scaled-up capacities can mean scaled-up problems when systems fail — releasing dangerous toxins, forces, energies, etc., at scaled-up rates. Human adaptiveness is often poorly understood by automation initiators. |
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Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad.
Sea cucumbers are found on the sea floor worldwide. Sea cucumbers serve a useful role in the marine ecosystem as they help recycle nutrients, breaking down detritus and other organic matter after which bacteria can continue the degradation process. Like all echinodermssea cucumbers have an endoskeleton just below the skin, calcified structures that are usually reduced to isolated microscopic ossicles or sclerietes joined by connective tissue.
In some species these can sometimes be enlarged to flattened plates, forming an armour. In pelagic species such as Pelagothuria natatrix order Elasipodidafamily Pelagothuriidaethe skeleton is absent and there is no calcareous ring. Sea cucumbers are named for their resemblance to the fruit human body systems video the cucumber plant. Most sea cucumbers, as their name suggests, have a soft and cylindrical body, nody or less lengthened, rounded off and occasionally fat in the extremities, and generally without solid appendages.
Their shape ranges from almost spherical for "sea apples" genus Pseudocolochirus to serpent-like for Apodida or the classic sausage-shape, while others resemble caterpillars.
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The mouth is surrounded by tentacles, which can be pulled back inside the animal. The largest American species, Holothuria floridanawhich abounds just below low-water mark on the Florida reefs, has a volume of well over cubic centimeters 31 cu in[7] and 25—30 cm 10—12 in long. Most possess five rows of tube feet called " podia "but Apodida lacks these and moves by crawling; the podia can be of smooth aspect or provided with fleshy appendages like Thelenota ananas. The read article on the dorsal surface generally have no locomotive role, and are transformed into papillae.
At one of the extremities opens a rounded mouth, generally surrounded with a crown of tentacles which can be human body systems video complex in some species they are in fact modified podia ; the anus is postero-dorsal.
Holothurians do not look like other vidfo at first glance, because of their tubular body, without visible skeleton nor hard appendixes. Furthermore, the fivefold symmetry, human body systems video for echinoderms, although preserved structurally, is doubled here by a bilateral symmetry which makes them look like chordates. Link, a central symmetry is still visible in some species through five 'radii', which extend from the mouth to the anus just like for sea urchinson which the tube feet are attached.]
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