Worms picturesAdvanced Photoshop Pictures Contest - 12 image entries
Contest Directions: 
Scientists have discovered that
red worms living in the ocean eat whale bones, as well as bones of dolphins and skeletons of large fish.
Photoshop worms any way you like. Some examples are: show worms eating unusual materials and objects - glass, metal, books, cars, etc,; show how life would be different if worms ruled the world. Any kind of worms are allowed in this contest but try to avoid graphic and gross entries.
[ browse best gallery pictures ] Tag pix worms
Jackpot: 1st place: $5, 2nd place: $3 , 3rd place: $2
Started: 12/21/2007 6:00:00 AM, Ended: 12/23/2007 6:00:00 AM
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| | Round worms or Nematodes belong to the phylum of invertebrates. Body form is usually porrect and spindle-shaped. Length varies from microscopic to several meters. Digestive tract is straight with mouth cavity at the front and anus at the back. Between body wall and intestine located is primary body cavity (pseudocoelom) filled with liquid and differs from secondary (coelom) by the absence of epithelial lining. Outwardly, body is layered with firm cuticle, at the bottom is- thin layer of live hypodermis and beneath that present are cords of lateral muscles. Peculiar to nematodes are four hypodermic cushions (“chordes”) pressed into the body cavity: dorsal (spinal), ventral (abdominal) and two collaterals. Within first two cushions pass through are nerve trunks, when it concerns collaterals–sensory nerves and excretory canals. Animals are usually dioecious but hermaphrodites are known too. Larvae are hatched out of inseminated eggs either in the outside environment, or in genital tracts of female itself. Reminiscing arthropods, when larvae grow and mature, they shed periodically cramped cuticle and acquire a new one.
After insects, this is the second type in of animal kingdom by diversity-wise. It is considered that nematodes are counted several hundred thousand types. They can be seen in any climates suitable for life and play significant role in ecosystems. Billions of free-living nematodes can inhabit on a territory of 1 hectare and they, it seems, enrich soils fertility. Some types are plant parasites; they infest roots, stems and seeds of many valuable crop cultures. Among nematodes also known are parasites and commensals of animals of all large systematic groups including animalcular. Bio-systematics of round worms is not well developed. One among system classifications is this group is divided into two sub groups: phasmids (Phasmidia) and amphids (asphimidia). Difference between them is explained by presence or absence of tail chemoreceptors (phasmids) and also by peculiarities in structure-so called side organs (amphids) which are supposed to be with chemoreceptor function and are located symmetrically on external side parts of head area.
Phasmides are related to majority of soil as well as parasitic nematodes. . Among phasmid group of nematodes - interesting are the following: Genus Rhabditis is combined of free living types. Dwarf thread worm (Strongyloides stercoralis) causes strongyloidosis -nodular worm disease with an affect like “butterflies in the stomach” and skin eruptions. Vinegar eel (Turbatrix aceti) is often seen in unsterilized vinegar. Necator americanus (in tropics) and Ancylostoma duodenale (in Old world) causes dochmiasis – helminthiasis fraught with anemia due to loss of blood in intestinal tract damaged by parasites. Infant pinworm (Enterobius vermicularis) is a widespread tapeworm causing itchiness in anal area and perineum. Ascaris lumbricoides is the cause of ascariasis affecting lungs at the first stage and intestinal tract at later. Very Important from medicinal point of view is the group of filarial and filarial alga which affect hypoderm and lymphatic system filariasis and filariatosis). One among the types of this group is Wuchereria bancrofti which settles in lymphatic tubes, resulting in their inflammation and - in most severe cases – by blocking them develop the elephantiasis. Filaria (Onchocerca volvulus) affects skin and eyes (onchocerciasis) may cause so called river blindness (carriers are the midges, plentiful along the tropical rivers). Philaria Loa Loa causes loaiasis or Calabar swelling, featured with temporary hydrops and conjunctivitis.
Generally water nematodes and only several parasitic types are related to non-phasmid sub group. Trichinella spiralis causes trichinellosis with eyelids swelling and severe pains in muscles (here larvae stay), but the giant kidney worm (Dioctophyma renale) mainly affects kidneys (dioctofimosis). |
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