Pharyngeal pouch (embryology)

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Pharyngeal pouch (embryology)
Kiemenbogen.jpg
Pattern of the branchial arches. I-IV branchial arches, 1-4 branchial pouches (inside) and/or pharyngeal grooves (outside)
a Tuberculum laterale
b Tuberculum impar
c Foramen cecum
d Ductus thyreoglossus
e Sinus cervicalis
Gray979.png
Floor of pharynx of human embryo about twenty-six days old.
Gray's subject #13 65
Carnegie stage 10
Dorlands/Elsevier p_31/12662655

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Overview

In the development of vertebrate animals, Pharyngeal or branchial pouches form on the endodermal side between the branchial arches, and pharyngeal grooves (or clefts) form the lateral ectodermal surface of the neck region to separate the arches. The pouches line up with the clefts, and these thin segments become gills in fish.

The pouches

First pouch

This is the only pouch in which the endoderm and ectoderm remain close together, as the tympanic membrane. There is minimal mesoderm in the tympanic membrane.

Other mesoderm derivatives include: Meckel's cartilage (mandible, malleus, incus, sphenomandibular ligament), muscles (temporalis, masseter, later and medial pterygoids, mylohyoid, anterior belly digastric, tensor tympani, tensor veli palatini, anterior 2/3 tongue), and nerves (CN V2, CN V3).

Second pouch

Third pouch

  • The third pouch possesses Dorsal and Ventral wings. Derivatives of Dorsal 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

Fifth pouch

  • Rudimentary structure, becomes part of the fourth pouch contributing to thyroid C-cells.[1]

See also

References

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Cost Effectiveness of Pharyngeal pouch (embryology)

| group5 = Clinical Trials Involving Pharyngeal pouch (embryology) | list5 = Ongoing Trials on Pharyngeal pouch (embryology) at Clinical Trials.govTrial results on Pharyngeal pouch (embryology)Clinical Trials on Pharyngeal pouch (embryology) at Google


| group6 = Guidelines / Policies / Government Resources (FDA/CDC) Regarding Pharyngeal pouch (embryology) | list6 = US National Guidelines Clearinghouse on Pharyngeal pouch (embryology)NICE Guidance on Pharyngeal pouch (embryology)NHS PRODIGY GuidanceFDA on Pharyngeal pouch (embryology)CDC on Pharyngeal pouch (embryology)


| group7 = Textbook Information on Pharyngeal pouch (embryology) | list7 = Books and Textbook Information on Pharyngeal pouch (embryology)


| group8 = Pharmacology Resources on Pharyngeal pouch (embryology) | list8 = AND (Dose)}} Dosing of Pharyngeal pouch (embryology)AND (drug interactions)}} Drug interactions with Pharyngeal pouch (embryology)AND (side effects)}} Side effects of Pharyngeal pouch (embryology)AND (Allergy)}} Allergic reactions to Pharyngeal pouch (embryology)AND (overdose)}} Overdose information on Pharyngeal pouch (embryology)AND (carcinogenicity)}} Carcinogenicity information on Pharyngeal pouch (embryology)AND (pregnancy)}} Pharyngeal pouch (embryology) in pregnancyAND (pharmacokinetics)}} Pharmacokinetics of Pharyngeal pouch (embryology)


| group9 = Genetics, Pharmacogenomics, and Proteinomics of Pharyngeal pouch (embryology) | list9 = AND (pharmacogenomics)}} Genetics of Pharyngeal pouch (embryology)AND (pharmacogenomics)}} Pharmacogenomics of Pharyngeal pouch (embryology)AND (proteomics)}} Proteomics of Pharyngeal pouch (embryology)


| group10 = Newstories on Pharyngeal pouch (embryology) | list10 = Pharyngeal pouch (embryology) in the newsBe alerted to news on Pharyngeal pouch (embryology)News trends on Pharyngeal pouch (embryology)


| group11 = Commentary on Pharyngeal pouch (embryology) | list11 = Blogs on Pharyngeal pouch (embryology)

| group12 = Patient Resources on Pharyngeal pouch (embryology) | list12 = Patient resources on Pharyngeal pouch (embryology)Discussion groups on Pharyngeal pouch (embryology)Patient Handouts on Pharyngeal pouch (embryology)Directions to Hospitals Treating Pharyngeal pouch (embryology)Risk calculators and risk factors for Pharyngeal pouch (embryology)


| group13 = Healthcare Provider Resources on Pharyngeal pouch (embryology) | list13 = Symptoms of Pharyngeal pouch (embryology)Causes & Risk Factors for Pharyngeal pouch (embryology)Diagnostic studies for Pharyngeal pouch (embryology)Treatment of Pharyngeal pouch (embryology)

| group14 = Continuing Medical Education (CME) Programs on Pharyngeal pouch (embryology) | list14 = CME Programs on Pharyngeal pouch (embryology)

| group15 = International Resources on Pharyngeal pouch (embryology) | list15 = Pharyngeal pouch (embryology) en EspanolPharyngeal pouch (embryology) en Francais

| group16 = Business Resources on Pharyngeal pouch (embryology) | list16 = Pharyngeal pouch (embryology) in the MarketplacePatents on Pharyngeal pouch (embryology)

| group17 = Informatics Resources on Pharyngeal pouch (embryology) | list17 = List of terms related to Pharyngeal pouch (embryology)


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