Anatomy

Urachus

An embryonic structure originating from the ALLANTOIS. It is a canal connecting the fetal URINARY BLADDER and the UMBILICUS. It is normally converted into a fibrous cord postnatally. When the canal fails to be filled and remains open (patent urachus), urine leaks through the umbilicus.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An embryonic structure originating from the ALLANTOIS. It is a canal connecting the fetal URINARY BLADDER and the UMBILICUS. It is normally converted into a fibrous cord postnatally. When the canal fails to be filled and remains open (patent urachus), urine leaks through the umbilicus.

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

Loading graph…

Drag nodes to rearrange; hover to trace links; click a node to open its page.

MeSH Record

Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

Indexing Annotation

patent urachus: index under URACHUS /abnorm: do not confuse with URACHAL CYST

MeSH Hierarchy

Tree Number

  1. A16.890w

MeSH Record

NLM Classification

WQ 210.5

AMA Style

References

  1. National Library of Medicine. Urachus. Medical Subject Headings (MeSH). 2026. Unique ID D014497. http://id.nlm.nih.gov/mesh/2026/D014497
  2. Urachus. In: Wikipedia. https://en.wikipedia.org/wiki/Urachus
  3. Urachus. In: Wikidata. https://www.wikidata.org/wiki/Q1858490