Nematode | Definition, Description, Diseases, & Facts | Britannica
2024年9月18日 · 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 environments, and even such unusual places as vinegar. Learn more …
Nematodes - Cornell University
Nematodes are simple roundworms. Colorless, unsegmented, and lacking appendages, nematodes may be free-living, predaceous, or parasitic. Many of the parasitic species cause important diseases of plants, animals, and humans. Other species are beneficial in attacking insect pests, mostly sterilizing or otherwise debilitating their hosts.
Nematodes: Classification, Structure, and Characteristics
Nematodes are a diverse group of worms that make up the phylum Nematoda. Otherwise known as roundworms, nematodes live as either free-living organisms in terrestrial and aquatic organisms or as parasites in plants and animals.
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 because most are microscopic and transparent.
Introduction to Nematodes - UC Davis
Nematodes are invertebrate roundworms that inhabit marine, freshwater, and terrestrial environments. They comprise the phylum Nematoda (or Nemata) which includes parasites of plants and of animals, including humans, as well as species that feed on bacteria, fungi, algae, and on other nematodes.
Nematode - New World Encyclopedia
The nematodes or roundworms (Phylum Nematoda from Greek νῆμα (nema): "thread" + ode "like") are one of the most common phyla of animals, with over 20,000 different described species. They have bodies that are long and slender and taper at both ends.
What is a Nematode? - University of Nebraska–Lincoln
The nematode digestive system is generally divided into three parts, the stomodeum, intestine, and proctodeum. The stomodeum consists of the “mouth and lips”, buccal cavity, and the pharynx (esophagus).
Nematodes - Phylum Nematoda - Examples, Classification/Characteristics
Nematodes, commonly known as roundworms, are a group of worms that make up the phylum Nematoda. With well over 15,000 species identified today, they can be found in different habitats ranging from terrestrial to marine environments.
Nematode Infections: Background, Pathophysiology, Epidemiology - Medscape
2015年2月23日 · Nematode infections in humans include ascariasis, trichuriasis, hookworm, enterobiasis, strongyloidiasis, filariasis, and trichinosis, among others. The phylum Nematoda, also known as the...
14.16: Phylum Nematoda - Biology LibreTexts
2021年2月28日 · The Nematoda, like most other animal phyla, are triploblastic and possess an embryonic mesoderm that is sandwiched between the ectoderm and endoderm. They are also bilaterally symmetrical, meaning that a longitudinal section will divide them into right and left sides that are symmetrical.
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