World Library  
Flag as Inappropriate
Email this Article

Pharyngeal pouch (embryology)

Article Id: WHEBN0003519753
Reproduction Date:

Title: Pharyngeal pouch (embryology)  
Author: World Heritage Encyclopedia
Language: English
Subject: Pharyngeal groove, Pharyngeal arch, Embryology, Pharyngeal pouch, Parafollicular cell
Collection: Developmental Biology, Embryology, Human Head and Neck, Vertebrate Anatomy
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Pharyngeal pouch (embryology)

Pharyngeal pouch
Pattern of the branchial arches. I-IV branchial arches, 1-4 pharyngeal pouches (inside) and/or pharyngeal grooves (outside)
a Tuberculum laterale
b Tuberculum impar
c Foramen cecum
d Ductus thyreoglossus
e Sinus cervicalis
Floor of pharynx of human embryo about twenty-six days old.
Details
Latin sacci pharyngei
Carnegie stage 10
Identifiers
Code TE E5.4.2.0.0.1.1
Anatomical terminology

In the embryonic development of vertebrates, pharyngeal pouches form on the endodermal side between the pharyngeal arches. The pharyngeal grooves (or clefts) form the lateral ectodermal surface of the neck region to separate the arches.

The pouches line up with the clefts,[1] and these thin segments become gills in fish.

Contents

  • Specific pouches 1
    • First pouch 1.1
    • Second pouch 1.2
    • Third pouch 1.3
    • Fourth pouch 1.4
    • Fifth pouch 1.5
    • Sixth pouch 1.6
  • See also 2
  • References 3
  • External links 4

Specific pouches

First pouch

The endoderm lines the future auditory tube (Pharyngotympanic Eustachian tube), middle ear, mastoid antrum, and inner layer of the tympanic membrane.

Second pouch

Third pouch

  • The third pouch possesses Dorsal and Ventral wings. Derivatives of the dorsal wings include the inferior parathyroid glands, while the ventral wings fuse to form the cytoreticular cells of the thymus. The main nerve supply to the derivatives of this pouch is Cranial Nerve IX, glossopharyngeal nerve.

Fourth pouch

Derivatives include:

Fifth pouch

  • Rudimentary structure, becomes part of the fourth pouch contributing to thyroid C-cells.[2]

Sixth pouch

  • The sixth pouch does not exist. The fourth and sixth arches contribute to the formation of the musculature and cartilage of the larynx[3]

See also

References

  1. ^ "pharyngeal pouch" at Dorland's Medical Dictionary
  2. ^ Endocrine Glands
  3. ^ Carlson, Bruce (2004). Human Embryology and Developmental Biology. Elsevier Mosby.  

External links

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.