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The Oral (Mouth) Cavity

The apex of the tongue is turned upward, and on the right side a superficial dissection of its under surface has been made.

On the under surface of the tongue the mucous membrane is smooth and devoid of papillæ. In the middle line, the mucous membrane extends to the floor of the mouth as a distinct fold—the frenulum—the free edge of which runs forward to the symphysis menti. Sometimes the ranine vein can be seen immediately beneath the mucous membrane, a little lateral to the frenulum.

Close to the attachment of the frenulum to the floor of the mouth, the slit-like orifice of the submaxillary duct is visible on either side. Running backward and lateralward from the orifice of the submaxillary duct is the plica sublingualis, produced by the projection of the sublingual gland which lies immediately beneath the mucous membrane. The plica serves also to indicate the line of the submaxillary duct and of the lingual nerve.

At the back of the mouth is the isthmus faucium, bounded above by the palatine velum, from the free margin of which the uvula projects downward in the middle line.

On either side of the isthmus are the two palatine arches, the anterior formed by the Glossopalatinus and the posterior by the Pharyngopalatinus. Between the two arches of either side is the palatine tonsil, above which is the small supratonsillar recess; the position of the tonsil corresponds to the angle of the mandible.

When the mouth is opened widely, a tense band—the pterygomandibular raphé—can be seen and felt lateral to the glossopalatine arch. Its lower end is attached to the mandible behind the last molar tooth, and immediately below and in front of this the lingual nerve can be felt; the upper end of the ligament can be traced to the pterygoid hamulus. About 1 cm. in front of the hamulus and 1 cm. medial to the last molar tooth of the maxilla is the greater palatine foramen through which the descending palatine vessels and the anterior palatine nerve emerge. Behind the last molar tooth of the maxilla the coronoid process of the mandible is palpable.

Gray's Images: Development | Lymphatic | Neural | Vision | Hearing | Somatosensory | Integumentary | Respiratory | Gastrointestinal | Urogenital | Endocrine | Surface Anatomy | iBook | Historic Disclaimer

Historic Disclaimer - information about historic embryology pages

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)

iBook - Gray's Embryology

iTunes link | iBooks Store Description - an extract of the embryology content from Anatomy of the Human Body By Henry Gray Philadelphia: Lea & Febiger, 1918. Releases First Edition - Jan 2012 Second Edition - March 2012 Repaired formatting and image display issues related to Pad rotated display and minor editing issues. Print length 169 pages, 41.6 MB, Language English. The current website also includes numerous images from this textbook, see Anatomy of the Human Body by Henry Gray and Category:Gray's 1918 Anatomy. Note the also Historic Disclaimer.

Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.

Cite this page: Hill, M.A. (2024, April 26) Embryology Gray1202.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray1202.jpg

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