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  1. Nematode - Wikipedia

    The nematodes (/ ˈnɛmətoʊdz / NEM-ə-tohdz or NEEM-; Ancient Greek: Νηματώδη; Latin: Nematoda), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum …

  2. Nematode | Definition, Description, Diseases, & Facts | Britannica

    Nov 6, 2025 · Nematodes are among the most abundant animals on Earth. They occur as parasites in animals and plants or as free-living forms in soil, fresh water, marine …

  3. Nematodes Explained: The Good, the Bad and the Harmful

    Oct 15, 2025 · Nematodes are everywhere: in soil, compost and even inside humans. See how these microscopic worms help and harm ecosystems.

  4. What are Nematodes? - Department of Nematology

    Nematodes have been reported from every continent on earth and occur in deserts, swamps, the oceans, the tropics and Antarctica. Usually nematodes are invisible to all but a few specialists …

  5. Nematodes - PMC

    Approximately half of the world’s human population is infected with gastrointestinal nematodes: about 3.5 billion cases, of which 450 million, mostly children, are seriously ill. Approximately …

  6. Nematodes - Cornell University

    Nematodes are formulated and applied as infective juveniles, the only free-living and therefore environmentally tolerant stage. Infective juveniles range from 0.4 to 1.5 mm in length and can …

  7. Nematodes – Morphology, Classification, Examples - Biology …

    Oct 1, 2024 · What are Nematodes? Nematodes are a diverse group of organisms known for their elongated, cylindrical bodies and unsegmented structure. These worm-like creatures are found …

  8. What are nematodes: characteristics, classification and examples

    Jun 30, 2025 · If you want to know more about these surprising organisms of aquatic habits, land and parasites, continue reading this ecology article in which you will learn What are …

  9. Nematodes 101 | Parasites without Borders

    May 26, 2025 · What is special about nematodes? Infections caused by nematodes are among the most prevalent, affecting nearly all humans at one time in our lives. The typical nematode, …

  10. Nematodes are the most abundant multicellular animals in the planet. Nematodes have colonized nearly every habitat on earth. Nematodes can exist in extreme environmental conditions. …