Search results
27 sty 2006 · The phylum Nematoda comprises a wide range of roundworms that can be grouped either in nutritional (microbotrophic, predaceous, or parasitic in plants, invertebrates, or vertebrates) or...
The nervous system of roundworms is comprised of anterior nervous tissue surrounding the pharynx that forms dorsal and ventral nerve cords that go from end to end (Waggoner 2004). The nerve ring is called the circumpharyngeal commisure encircles the isthmus of the pharynx.
Nematodes are a diverse group of roundworms that exist in nearly every environment on Earth. They can be found in soil, water, and even as parasites in plants and animals. While some nematodes are free-living and contribute positively to ecosystems by aiding in nutrient recycling and controlling other organisms like bacteria, others are parasitic.
Roundworms may be free-living or parasitic. Free-living worms are found mainly in freshwater habitats. Some live in soil. They generally feed on bacteria, fungi, protozoans, or decaying organic matter. By breaking down organic matter, they play an important role in the carbon cycle. Parasitic roundworms may have plant, vertebrate, or ...
26 sie 2010 · The nematodes, or roundworms, possess a pseudocoelom and consist of both free-living and parasitic forms. Finally, the arthropods, one of the most successful taxonomic groups on the planet, are coelomate organisms with a hard exoskeleton and jointed appendages.
1 sty 2001 · An introduction to the world of nematodes. This exercise will be most useful for grades 7-12 in classrooms where dissecting and compound microscopes are available. It requires minimal materials (funnels, screen, tubing, clamps, 2-ply tissues, ring stand, soil sample, and water) and preparation.
This Osmosis High-Yield Note provides an overview of Nematodes (roundworms) essentials. All Osmosis Notes are clearly laid-out and contain striking images, tables, and diagrams to help visual learners understand complex topics quickly and efficiently.
