Histology of the Oral Cavity and Salivary Glands Flashcards
What are the four functions of the alimentary mucosa?
- ) Secretion
- ) Absorption
- ) Barrier
- ) Immunologic protection
What is the vestibule in the oral cavity?
The space between the teeth and the lips/cheeks
What are the borders of the cavity proper?
Superior: hard and soft palates
Inferior: tongue
Posterior: entrance to the oropharynx
Anterior: teeth
What does the oral mucosa that lines the oral cavity consist of?
- ) Masticatory mucosa
- ) Lining mucosa
- ) Specialized mucosa
What does masticatory mucosa consist of?
Gingiva and hard palate
What does lining mucosa consist of?
Layers of lips, cheeks, alveolar mucosal surfaces, floor of mouth, inferior surface of the tongue and soft palate
What does lining mucosa cover?
- ) Striated muscle
- ) Bone
- ) Glands
What is thicker: keratinized or non-keratinized lining epithelium?
Non-keratinized lining epithelium
What does the non-keratinized lining epithelium consist of?
Stratum basale: single layer
Stratum spinosum: several layers
Stratum superficiale: multilayered
What is the lamina propria?
Layer underlying the lining mucosa with a thick papillary layer of loose connective tissue containing blood vessels and nerves
Where is the specialized mucosa found?
On the dorsal surface of the tongue
What is the role of specialized mucosa?
Associated with the sensation of taste
What does the specialized mucosa contain?
Papillae and taste buds responsible for generating the chemical sensation of taste
What are the four types of papillae?
Circumvallate
Fungiform
Filliform
Foliate
What is the only papillae to not contain taste buds?
Filliform
How many primary teeth do we have?
20 teeth 8 incisors 4 canine 8 molars
How many secondary teeth do we have?
32 teeth 8 incisors 4 canine 8 premolars 12 molars
What are the three layers that make up teeth?
Enamel
Dentin
Cementum
How is enamel formed?
Initially secreted by secretor-stage ameloblasts and then maturation-stage ameloblasts
What is enamel mostly consist of?
Calcium hydroxyapatite
What is dentin?
Calcified material deep to the enamel and cementum
What creates dentin?
Secreted by odontoblasts
Where is cementum found?
Covering the tooth’s root
What are parakeratinized cells?
Cells that are not fully keratinized yet and have a nuclei
What are the three salivary glands?
Parotid
Submandibular
Sublingual
What are acini?
Cells that produce fluid
What color do mucous secreting cells stain?
Light pink
What color do fluid secreting cells stain?
Dark pink
What type of gland is the parotid gland?
Serous secreting
Submandibular gland:
Both serous and mucous secreting
Sublingual gland:
Mucus fluid secreting
