21. The oral cavity, pharynx, and esophagus Flashcards
The oral cavity begins at the vermilion border and terminates at:
Junction of the hard and soft palate and the circumvallate papillae (linea terminalis)
Boundaries of the oropharynx?
From function of the hard and soft palate and the circumvallate papillae to the valleculae (plane of hyoid bone)
Boundaries of the hypopharynx?
Level of the hyoid bone to the level of the inferior border of the cricoid cartilage
What duct drains the parotids?
Where does it feed into the oral cavity?
Stenson’s
Lateral to the second molars
What duct drains the submaxillary glands?
Where does it feed into the oral cavity?
Wharton’s
Midline floor of mouth adjacent to the lingual frenulum
What ducts drain the sublingual gland?
Rivinus’
How many deciduous teeth are there? Adult?
20
32
What types of papillae cover the anterior 2/3 of the tongue?
Filiform (no taste)
Fungiform (diffuse)
Foliate (lateral)
What large papillae lie in a V shape at the junction of the anterior and posterior tongue?
Circumvallate papillae
What is the name of the grove at the anterior margin of the circumvallate papillae?
Sulcus terminalis
What is the name of the pit at the junction of the sulcus terminalis from which the embryologic thyroid begins its descent?
Foramen cecum
What is the anterior fold of the mucous membrane that attaches the anterior inferior aspect of the tongue to the floor of mouth and gingiva?
Lingual frenulum
What are the depressions on either side of the midline glossoepiglottic fold extending to the level of the hyoid bone?
Valleculae
What nerve controls the extrinsic muscles of the tongue?
CN XII
What are the 4 extrinsic muscles of the tongue?
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus
