Organisms

Nematoda

A phylum of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A phylum of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and esophageal structures. Many species are parasites.

MeSH Record

Classification

Broader headings

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MeSH Record

See Also

MeSH Record

Synonyms

3 entry terms
  • Phasmidia
  • Secernentea
  • Sipunculida

MeSH Record

Aspects Covered

19 allowable subheadings

Indexed with the subheadings anatomy & histology, chemistry, classification, cytology, drug effects, embryology, enzymology, genetics, growth & development, immunology, isolation & purification, metabolism, microbiology, parasitology, pathogenicity, physiology, radiation effects, ultrastructure, virology.

MeSH Record

Indexing Annotation

general or unspecified; prefer specifics; infection = NEMATODE INFECTIONS; coordinate with specific precoordinated helminth terms (ANTIGENS, HELMINTH, etc) if pertinent

MeSH Record

History Note

SIPUNCULIDA was heading 1980-84

MeSH Hierarchy

Tree Number

  1. B01w.050w.500w.500w.294w

AMA Style

References

  1. National Library of Medicine. Nematoda. Medical Subject Headings (MeSH). 2026. Unique ID D009348. http://id.nlm.nih.gov/mesh/2026/D009348
  2. Nematoda. In: Wikipedia. https://en.wikipedia.org/wiki/Nematode
  3. Nematoda. In: Wikidata. https://www.wikidata.org/wiki/Q5185