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embryonic cloaca

cloaca

The embryonic cloaca is an endoderm-lined chamber that develops as a pouch-like dilation at the caudal end of the hindgut. Three sets of structures open into or bound it: the allantois joins it ventrally, the two mesonephric ducts enter laterally, and caudally the chamber ends blindly at the cloacal membrane. That membrane is formed by the union of proctodeal ectoderm, derived from the anal pit, with cloacal endoderm, and it is distinctive in having no intervening mesoderm between the two germ layers. The cloaca is thus the common terminal chamber into which the early hindgut and the developing urinary drainage converge before subsequent partition, and it is classified here within the urinary system on the strength of the mesonephric duct connection.

Endoderm-lined chamber that develops as pouch-like dilation of the caudal end of the hindgut and receives the allantois ventrally and two mesonephric ducts laterally; caudally it ends blindly at the cloacal membrane formed by the union of proctodeal (anal pit) ectoderm and cloacal endoderm, with no intervening mesoderm[MP].

On this page
Type Organ
Système corporel Urinaire
Structure parente cloaca
Nom latin cloaca

Frequently Asked Questions

What is the embryonic cloaca?

Endoderm-lined chamber that develops as pouch-like dilation of the caudal end of the hindgut and receives the allantois ventrally and two mesonephric ducts laterally; caudally it ends blindly at the cloacal membrane formed by the union of proctodeal (anal pit) ectoderm and cloacal endoderm, with no

What body system is the embryonic cloaca part of?

The embryonic cloaca is part of the Urinaire.

What is the Latin name for the embryonic cloaca?

The Latin name for the embryonic cloaca is cloaca.

References

  1. UBERON — UBERON:0000163 Cross-species anatomy ontology (EMBL-EBI Ontology Lookup Service)
  2. Wikipedia — embryonic cloaca Encyclopedia article (verified cross-reference)

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.