By KDS4444 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=59073031 https://en.wikipedia.org/wiki/Allantois
Among these structures, the allantois is primarily a reservoir organ of metabolites, crucial for maintaining embryonic viability, and evolves throughout the CE developmental process (Ribatti, 2016; Chen et al., 2021). The allantois also functions for the respiration of gas exchange and calcium transportation from eggshell when forming chorioallantoic membrane (CAM) by fusing with the chorion (Tazawa and Whittow, 2000; Maina, 2017).
Poult Sci. 2023 Jul 1;102(9):102902. doi: 10.1016/j.psj.2023.102902 Dynamic 3D morphology of chick embryos and allantois depicted nondestructively by 3.0T clinical magnetic resonance imaging https://pmc.ncbi.nlm.nih.gov/articles/PMC10466300/
The allantois serves as a respiratory organ and as a reservoir for the excreta. These temporary organs function within the egg until the time of hatching and form no part of the fully developed chick.
硬口蓋は、場所の名前なので、口蓋骨Palatine Bone (パラタイン・ボーン)、上顎骨Maxilla (マクシラ)、周囲の軟部組織や粘膜などから成り立っています。
philtrum
The philtrum (Latin: philtrum from Ancient Greek φίλτρον phíltron, lit. “love charm“) or medial cleft is a vertical indentation in the middle area of the upper lip, common to therian mammals, extending in humans from the nasal septum to the tubercle of the upper lip. (Wikipedia)
The first pharyngeal archsplits into two distinct processes during early development: Maxillary processes: These are lateral extensions of the first arch. Mandibular processes: These are ventral extensions that fuse at the midline to form the lower jaw. (ChatGTP)
下の動画ではprimitive mouth pitとも紹介されています。
Development Of Face || Face Development || Development Of Face Embryology || Stomodeum #medicine Medicine Simplified チャンネル登録者数 1620人
質問:Is “buccopharyngeal membrane” the same as “oropharyngeal membrane”?
回答(ChatGPT)
The buccopharyngeal membrane and the oropharyngeal membrane refer to the same embryological structure, but the terminology used depends on the context or preference of the source.
Embryological Structure: Both terms describe the bilaminar membrane that forms at the cranial end of the developing embryo, consisting of ectoderm externally and endoderm internally. This membrane separates the primitive oral cavity (stomodeum) from the foregut.
Developmental Significance: The buccopharyngeal/oropharyngeal membrane breaks down during the fourth week of development to establish a connection between the oral cavity and the pharynx.
Terminological Preference:
Buccopharyngeal membrane: This term is more traditional and emphasizes the boundary between the future oral (buccal) and pharyngeal regions.
Oropharyngeal membrane: This is more commonly used in modern embryology texts and aligns with the terminology of the adult anatomy (oral cavity and pharynx).
The two terms are interchangeable and refer to the same structure. “Oropharyngeal membrane” is now more widely used in contemporary literature, reflecting updated anatomical terminology.