(E1) 2 - Oral Cavity Overview Flashcards
Exam 1 - KLING (NOT ON EXAM)
______ is the gateway to the GI tract and respiratory system.
Oral cavity
Basic Functions of the Oral Cavity
What are the three types of oral mucosa?
The oral cavity is divided into two parts. What are they
- Oral vestibule
- Oral cavity proper
The _____ begins as an ectodermal depression, represents the future oral cavity/mouth
Stomodeum
What is hypekeratosis?
__________- develops as part of the pharyngeal tube and arises predominantly from PA 2,3,4
Oropharynx
What is the vestibular lamina? (labiogingival)
What is the stomodeum surrounded by?
What is the oral vestibule?
Slit-like spaces between the teeth and gingiva (gums) and the lips and cheers.
What are the boundaries of the oral vestibule?
What are the functions of the oral vestibule?
What are the contents of the oral vestibule?
What are the named mucosal features in the oral vestibule?
Image of Oral Vestibule
What is the oral cavity proper?
Space between the upper and lower dental arches.
Boundaries: Oral Cavity Proper
Functions: Oral Cavity Proper
Contents: Oral Cavity Proper
What is the Oropharynx?
Function: Oropharynx
Boundaries: Oropharynx
Contents: Oropharynx
What is the oral mucosa?
A mucous membrane is a moist lining of the
nasal cavity, oral cavity, and other passageways
What composes mucosa?
Epithelium + Lamina Propria
Oral mucosa may be derived from ________
ectoderm or endoderm depending on the location
Oral mucosa extends from _______ to the __________
lips to the oropharynx
Describe the epithelium components of the Oral Mucosa. - Types, Turnover, and Function
Describe the Lamina Propria of the Oral Mucosa - Function and Composition
Describe the submucosa of the oral mucosa (may be absent) - Contents, function, composition
What is the mucoperiosteum?
Region where submucosa is absent and lamina propria attaches directly to the periosteum of the bone.
Where do you find bone or muscle in the oral mucosa?
Deep to the submucosa or LP when submucosa is absent.
(deepest layer)
Describe SSNK in the Oral Mucosa
Describe SSPK in the Oral Mucosa
Describe SSK in the Oral Mucosa
Where is the lining mucosa found?
Found on the lips, cheeks, alveolar mucosal
surface, floor of the mouth, inferior surfaces of the
tongue and soft palate
At these sites, it covers striated muscle, bone and glands
What epithelium makes up the lining mucosa?
- Stratified squamous non-keratinized (SSNK)
Describe the LP and Submucosa of the lining mucosa.
- Lamina propria: less numerous and shallow CT
papilla; high amount of elastic fibers - Submucosa is bound to muscle, also contains
minor salivary glands
What is present in the lining mucosa?
Shallow epidermal (rete) ridges and CT papilla
interface
Describe the result composition of the lining mucosa.
Result is soft , pliable and flexible in order to adjust
to movement of underlying muscle (submucosa
and rete ridge: CT papilla interface)
Where do you find masticatory mucosa epithelium?
Found on the hard palate (anterior and posterior) and gingiva (free and attached)
Describe the layers the make up the masticatory mucosa epithelium.
Describe the result of the composition of the masticatory mucosa epithelium.
What is specialized mucosa?
What are the layers that make up specialized mucosa?
% Breakdown of Types of Mucosa
60% Lining Mucosa
30% Masticatory Mucosa Epithelium
10% Specialized Mucosa
