Buccopharyngeal membrane
Embryology - 29 Mar 2024 Expand to Translate |
---|
Google Translate - select your language from the list shown below (this will open a new external page) |
العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. (More? About Translations) |
Introduction
The buccopharyngeal membrane (Latin, bucca = cheek) or oral membrane, forms the external upper membrane limit (cranial end) of the early gastrointestinal tract (GIT). This membrane region first develops in the trilaminar embryo (week 3) during gastrulation. The "membrane" quality comes from being composed of only ectoderm and endoderm, without a middle (intervening) layer of mesoderm.
The membrane lies at the floor of the ventral depression (stomadeum) where the oral cavity will open. The membrane will breakdown to form the initial "oral opening" of the pharynx of the foregut. At the lower end of the gastrointestinal tract the membrane region that forms is the cloacal membrane.
More recent papers |
---|
This table allows an automated computer search of the external PubMed database using the listed "Search term" text link.
More? References | Discussion Page | Journal Searches | 2019 References | 2020 References Search term: Buccopharyngeal membrane | |
Stage 11 Embryo
A ventral view scanning EM embryo head region (Carnegie stage 11, week 4, 25 days, 20 somite pairs) showing the buccopharyngeal membrane breaking down and opening the gastrointestinal tract to the amnion.
Note the position at the "floor" of the stomedeum and relative to the first pharyngeal arch and triangular shape. Midline crack in head is an artefact.
References
Reviews
Chen J, Jacox LA, Saldanha F & Sive H. (2017). Mouth development. Wiley Interdiscip Rev Dev Biol , 6, . PMID: 28514120 DOI.
Articles
Houssin NS, Bharathan NK, Turner SD & Dickinson AJ. (2017). Role of JNK during buccopharyngeal membrane perforation, the last step of embryonic mouth formation. Dev. Dyn. , 246, 100-115. PMID: 28032936 DOI.
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, March 29) Embryology Buccopharyngeal membrane. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Buccopharyngeal_membrane
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G