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42 Cards in this Set

  • Front
  • Back
2 Main parts of the Oral Cavity:
1. Vestibule
2. Oral cavity proper
What is the vestibule?
The place between the lips and teeth and cheeks.
Where does the tongue normally reside?
In the oral cavity proper
What lines the oral cavity?
A mucosa
What is a mucosa?
A membrane that lines every cavity connected with the external environment (UG, GI, respiratory, etc).
What are 3 functions of a Mucosa?
1. Immunological/physical barrier
2. Source of secretory products
3. Selective absorptive interface
What are the 3 types of mucosa that line the oral cavity?
1. Masticatory mucosa
2. Lining mucosa
3. Transitional zones mucosa
Where is the masticatory mucosa located?
In areas of maximum abrasion (Hard palate + gingiva)
What type of cells make up the Masticatory mucosa?
Keratinized Stratified Squamous cells.
What lies beneath any mucosa?
Lamina propria
What is a Lamina propria?
Cellular type of loose fibrous CT that supports, protects, and gives nutrition to a mucosa's epithelium.
What is the function of the lamina propria underlying mucoperiosteum (masticatory)?
It keeps the mucosa immovably attached to underlying bone - near the gums.
What structures of the lamina propria help it to function?
Deep papilla
Is there a submucosa underlying masticatory mucosa?
No; just bone.
Where is Lining mucosa found?
In areas of reduced abrasion within the oral cavity.
What type of epithelium covers the Lining Mucosa?
Nonkeratinized stratified squamous
What is the lamina propria like under lining mucosa?
Is there a submucosa under lining mucosa?
What is a Submucosa composed of? (3 things)
-Dense irregular fibrous CT
-Distributing vessels
What are 2 Transitional zones of mucosa in the oral cavity?
1. Mucocutaneous junction
2. Mucogingival junction
What is the mucocutaneous junction also known as and where is it found?
-Aka Vermilion border of lip;
-On lip where skin starts and lips end.
Where is the mucogingival junction?
Above the gums where they go from being masticatory mucosa to lining mucosa.
What is the Gingiva (gum) covered with?
Keratinized epithelium (masticatory)
What is the Alveolar mucosa covered with?
Nonkeratinized epithelium (lining)
What is the tongue covered with?
Lingual mucosa
What is lingual mucosa's composition similar to?
Masticatory mucosa
How is lingual mucosa different from masticatory?
It has lingual papillae
Does the lingual mucosa have a submucosa?
What part of the tongue is covered by lingual mucosa?
The superior part
4 types of Papillae on the tongue:
Which are not prominent in humans?
Which papillae are most numerous?
Type of epithelium on filiform papillae:
Thick cornified
Which papillae have taste buds?
-Fungiform (maybe)
-Circumvallate (for sure)
Where are circumvallate papillae located?
Just anterior to the sulcus terminalis
How many circumvallate papillae are there and how big are they?
-Fewest in number (7-12)
Main feature of Circumvallate papillae?
Contain numerous taste buds
Are taste buds found only on Circumvallate papillae?
No also on the Glossopharyng arch, Soft palate, Posterior epiglottis, and Posterior wall of pharynx.
What tonsil is at the root of the tongue?
What type of cells cover the dorsal lingual mucosa?
Nonkeratinized Stratified Squamous
Are lingual papillae present on the dorsal lingual mucosa?
What is present in the dorsal lingual mucosa?
A submucosa