WordNet

send by special mail that goes through diplomatic channels
an enclosed space; "the trapped miners found a pocket of air" (同)sac, sack, pocket
a small or medium size container for holding or carrying things
(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican) (同)pocket
put into a small bag
of or relating to gills (or to parts of the body derived from embryonic gills)
having a pouch

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(革製の)小袋(たばこ入れ・さいふなど);郵便袋;(兵隊の)弾薬袋 / (カンガルーなどの)腹袋 / (動物の)ほお袋 / (目の下の)たるみ

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/09/10 22:55:00」(JST)

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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.

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

Contributes the middle ear, palatine tonsils, supplied by the facial nerve.

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:

superior parathyroid glands and ultimobranchial body which forms the parafollicular C-Cells of the thyroid gland.
Musculature and cartilage of larynx (along with the sixth pharyngeal pouch).

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]

References

^ "pharyngeal pouch" at Dorland's Medical Dictionary
^ Endocrine Glands
^ Carlson, Bruce (2004). Human Embryology and Developmental Biology. Elsevier Mosby. ISBN 978-0-323-03649-8.

External links

Swiss embryology (from UL, UB, and UF) rrespiratory/korperhohlen01 (Item #1 at Fig. 14)
Embryology at Temple parch98/ARCHII97/sld017
hednk-021—Embryo Images at University of North Carolina
hednk-022—Embryo Images at University of North Carolina
Outline at howard.edu (scroll down to "III. THE PHARYNGEAL POUCHES")

UpToDate Contents

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4. 頚部腫瘤の鑑別診断 differential diagnosis of a neck mass
5. 副甲状腺の外科解剖学 surgical anatomy of the parathyroid glands

English Journal

Temporary vocal fold immobility after chemocauterization of the pyriform sinus fistula opening with trichloroacetic acid.

Park JH, Jung YH, Sung MW, Kim KH.SourceDepartment of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Boramae Hospital.
The Laryngoscope.Laryngoscope.2012 Jul 30. doi: 10.1002/lary.23530. [Epub ahead of print]
Pyriform sinus fistula (PSF) is a rare branchial pouch anomaly. Circumferential chemocauterization of the opening with trichloroacetic acid (TCA) is a simple, reliable treatment of choice with little morbidity. However, we experienced two cases of vocal fold immobility after chemocauterization of th
PMID 22847863

Various presentations of fourth branchial pouch sinus tract during surgery.

Lu WH, Feng L, Sang JZ, Wang L, Yuan LL, Gao L, Lou WH.SourceDepartment of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital, Zhengzhou University, Henan, PR China.
Acta oto-laryngologica.Acta Otolaryngol.2012 May;132(5):540-5. Epub 2012 Jan 11.
CONCLUSION: A recurrent neck abscess or acute suppurative thyroiditis should arouse suspicion of fourth branchial pouch sinus. Complete surgical excision is usually curative. The classification of sinus tract according to the area where it is emerging from the larynx may be helpful in identifying th
PMID 22236038

Japanese Journal

右側下咽頭梨状陥凹瘻孔の1例

日本気管食道科学会会報 65(6), 481-484, 2014
NAID 130004724637

下咽頭梨状陥凹背側に生じた異所性副甲状腺腫の1例

頭頸部外科 23(2), 151-155, 2013
NAID 130003385965

第1鰓嚢性瘻孔を伴った第1・第2鰓弓症候群例

耳鼻咽喉科臨床 100(9), 747-751, 2007-09-01
NAID 10019531247

Related Pictures

Pharyngeal pouch (embryology) Cervical sinus - Wikipedia Development of pharyngeal (branchial) apparatus – MistryLand Duke Embryology - Craniofacial Development Pharyngeal/Branchial Pouches – Stepwards 9 Pharyngeal Pouches - YouTube First Pharyngeal Pouch - Scanning Electron - 78 Steps Health Journal

★リンクテーブル★

リンク元	「咽頭嚢」「鰓嚢」
関連記事	「pouch」「branchia」「branchial」

「咽頭嚢」

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
Gray's	p.65
Code	TE E5.4.2.0.0.1.1
	Anatomical terminology