Where are nematodes found?

Question

Nematode is a good word. Tell me what you can about nematodes!

Answer 1

Nematodes, otherwise known as roundworms, are found just about everywhere, from the toops of the highest mountains to the depths of the sea. Free-living species are found in soil, in fresh water and in the ocean. Many types are parasitic in the bodies of both vertebrates (including humans) and invertebrates. Important human parasites include pinworms (Enterobius) ; hookworms (Necator and Ancylostoma); whipworms (Trichuris); pig intestinal roundworms (Ascaris); trichina worms (Trichinella); African eye worm (Loa); and Guinea worm (Dracunculus).

Answer 2

Black Sea near Sevastopol (Ukraine) Nematodes are the most numerous multicellular animals on earth. A handful of soil will contain thousands of the microscopic worms, many of them parasites of insects, plants or animals. Free-living species are abundant, including nematodes that feed on bacteria, fungi, and other nematodes, yet the vast majority of species encountered are poorly understood biologically. Nematodes are structurally simple organisms. Adult nematodes are comprised of approximately 1,000 somatic cells, and potentially hundreds of cells associated with the reproductive system . Nematodes have been characterized as a tube within a tube ; referring to the alimentary canal which extends from the mouth on the anterior end, to the anus located near the tail. Nematodes possess digestive, nervous, excretory, and reproductive systems, but lack a discrete circulatory or respiratory system. In size they range from 0.3 mm to over 8 meters.

Answer 3

Roundworm, also nematode, common name for any of a phylum of unsegmented terrestrial, freshwater, or marine worms. Roundworms are almost worldwide in distribution and are abundant in the surface layers of soils. Many of them are economically and medically harmful, living as parasites in plants and animals, including humans. Roundworm infections are common and frequently go unnoticed, but several species cause serious diseases.

Roundworms are cylindrical, tapering animals with simple bodies consisting of an interior gut and a muscular outer wall, separated by a fluid-filled cavity called a pseudocoel (see Animal: Coelom). The outer wall secretes an elastic cuticle that is molted four times during the animal's lifetime. Species range in size from microscopic to about 10 cm (about 4 in) long. Most species have separate sexes, but a few are hermaphroditic; fertilization is internal. The young roundworms, which resemble the adults, develop without metamorphosis.

Classification of the approximately 12,000 known species of roundworms—many thousands of unknown species are suspected—is a subject of some controversy among zoologists. Many include the Gordian worms (see Horsehair Worm) as a subclass, but others group them separately. Although numerous roundworms are free-living, the parasitic forms are of greatest economic interest. One important group, the ascaroid nematodes, includes the threadworms and the common worm of puppies. Another contains the eelworms, which produce root knot of cotton, and forms that produce earcockle of wheat. Other, medically significant forms of roundworm include the various genera known as hookworm; the filaria, which cause elephantiasis; the trichina worm, the cause of trichinosis; and the whipworm, which infests the human intestine.

Scientific classification: Roundworms make up the phylum Nematoda. Threadworms belong to the genus Ascaris. The common worm of puppies is classified as Toxocara canis. Eelworms belong to the genus Heterodera, the forms that produce earcockle of wheat belong to the genus Tylenchus, and the trichina worm belongs to the genus Trichinella. The human whipworm is classified as Trichuris trichiura.

Answer 4

Nematodes are Parasites found all over the world in both plants and animals. they are an essential part of evolution on Gods earth

Answer 5

Very small worms, normally found in damp soil.