File:Keith1902 fig015b.jpg

From Embryology

Original file(1,000 × 719 pixels, file size: 97 KB, MIME type: image/jpeg)

Fig. 15 B Showing the parts of the Buccal and Nasal Cavities formed from the Stomodaeum

The relative position of the Oral Plate (buccopharyngeal membrane) is indicated.

The stomodaeum (stomedeum) or primitive buccal cavity is the depression or narrow pocket formed between the fore-brain above and the mandibular arch below. It is bounded laterally by the or fundus being formed by the oral plate, which separates it from the primitive pharynx (Fig. 15 A).

The mesial nasal and palatal plates of the maxillary processes divide it into an upper part — the nasal cavities — and a lower, which forms part of the permanent buccal cavity (see Fig. 15 B).

The tongue is developed in the floor of the pharynx and the tonsils in the pharyngeal wall, but the lips, teeth, and gums are formed in the walls of the stomodaeum. In the 3rd week of foetal life the oral plate breaks down and the stomodaeum then communicates with the pharynx.

Development of the Face: Fig. 1 Embryo Nasal Maxillary and Mandibular processes | Fig. 2 Face Nasal, Maxillary and Mandibular processes | Fig. 3 Mesial Nasal Processes | Fig. 4 Newborn Vomer | Fig. 5 premaxilla and maxilla suture | Fig. 6 Lateral Nasal Processes | Fig. 7 Lateral and Mesial Nasal Processes | Fig. 8 Two maxillary processes 2nd month | Fig. 9 Hard Palate at birth | Fig. 10a-c Mandibular Arch and Maxillary Process | Fig. 10d Auditory Ossicles and Tympanic Plate | Fig. 11 Maxillary Antrum palate and molar teeth | Fig. 12 Lower Jaw Centres of Ossification | Fig. 13 Temporo-Maxillary Articulation | Fig. 14 TemporoMaxillary Articulation changes after birth | Fig. 15a Stomodaeum and Oral Plate | Fig. 15b Buccal and Nasal Cavities from Stomodaeum

Historic Disclaimer - information about historic embryology pages 
Mark Hill.jpg
Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Human Embryology and Morphology (1902): Development or the Face | The Nasal Cavities and Olfactory Structures | Development of the Pharynx and Neck | Development of the Organ of Hearing | Development and Morphology of the Teeth | The Skin and its Appendages | The Development of the Ovum of the Foetus from the Ovum of the Mother | The Manner in which a Connection is Established between the Foetus and Uterus | The Uro-genital System | Formation of the Pubo-femoral Region, Pelvic Floor and Fascia | The Spinal Column and Back | The Segmentation of the Body | The Cranium | Development of the Structures concerned in the Sense of Sight | The Brain and Spinal Cord | Development of the Circulatory System | The Respiratory System | The Organs of Digestion | The Body Wall, Ribs, and Sternum | The Limbs | Figures | Embryology History


Keith A. Human Embryology and Morphology. (1902) London: Edward Arnold.

Cite this page: Hill, M.A. (2024, June 22) Embryology Keith1902 fig015b.jpg. Retrieved from

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

current07:50, 29 December 2013Thumbnail for version as of 07:50, 29 December 20131,000 × 719 (97 KB)Z8600021 (talk | contribs) {{Keith1902_1_figures}} {{Human embryology morphology 1902 footer}}