Test Three Oral Cavity Flashcards
Oral cavity is made up
Lips, gums, cheeks, hard palate and soft palate
What must be added to make true oral cavity
Tongue and salivary glands
Function of oral cavity
Entrance to GI tract, taste of food, mechanical breakdown of food, speech, some digestion by amylase enzymes, inhibition of microbial growth by immunoglobulins and lactoperioxidase
Carb digestion begins where
Oral cavity
Lactoperoxidase breaksdown what
Pathogens
What are the three areas of the lips
Cutaneous, red, and oral
Describe cutaneous portion of lips
Keratinized, stratified squamous, sweat glands, sebaceous glands, hair follicles
Describe red area of lips
Non keratinized stratified squamous, tall vascular CT papillae, no glands
Describe oral area of lips
Non keratinized stratified squamous, vascular papillae, similar to histology of cheek, serous and mucous glands, skeletal muscle
Purpose of serous and mucous secreting glands in oral portion of lips
Lubrication for lips against teeth
Epithelium of gum
Keratinized stratified squamous
What is present in gums
Long vascular papillae
What is in the lamina propria of the gums
Dense irregular CT with course collagen fibers
Is submucosa or glands present in gums
No
Epithelium of hard palate
Keratinized stratified squamous with stratum granulosum
What is above the hard palate
Nasal cavity
Nasal cavity is lined with
Pseudostratified columnar epi with cilia
Inferior of the hard palate is
Oral cavity
Oral cavity is lined with
Stratified squamous
What is an identifying characteristic of hard palate
Bone
In anterior 1/2 of hard palate what is present
Yellow adipose
What will you see in posterior 1/2 of hard palate
Mucous glands that help lubricate food to pass down esophagus
Is long vascular CT papillae present in hard palate
Yes
The oral surface of the soft palate is covered by
Keratinized stratified squamous
The nasal surface of the soft palate is covered by
Respiratory epi
Is bone present in the soft palate
No
Describe submucosa of soft palate
Loose CT with a lot of mucous glands
What is an identifying characteristic of soft palate
Skeletal muscle
Function of saliva
Lubrication, cleans the mouth, adds moisture to food, clean surface of tongue and leave taste buds in clean state, digestive properties
Saliva is made up of
WATER, mucoproteins, immunoglobulins, carbs, ions, inorganic elements
Salivary glands are located
Outside of oral cavity
Salivary ducts form from
Secretory alveoli
What forms from the secretory alveoli
Intralobular duct
What are the two parts of the intralobular duct
Intercalated ducts and striated ducts
Intercalated ducts are lined with
Simple squamous to low columnar epithelium
Striated ducts are lined with
Simple columnar epithelium
The union of intralobular ducts creates
Interlobular ducts
Interlobular ducts are lined with
Simple columnar epithelium
Interlobular ducts unite into what
Interlobar ducts
Interlobar ducts are lined with
Stratified cuboidal epithelium
Interlobar ducts unite into what
Main duct of gland
Main duct of salivary gland is lined with
Stratified cuboidal epithelium
What are the two types of secretory units that make up salivary glans
Serous secretory unit and mucous unit
Serous secretory unit secretes
Watery material
Secretory units are made up of
Pyramidal cells that sit on a basal lamina an form a narrow lumen, central round nucleus
What is inside serous secretory units
Zymogen granules
Mucous secretory units secrete
A thick viscous fluid
Mucous secretory unit have cells that surround
A larger lumen with peripheral nucleus
What are serous demilunes
Mixed aveoli that has mucous secretory units with a crescentric shaped serous cap off one side
Zymogen granules produce
Digestive enzymes
What are the three different types of salivary glands
Parotid gland, submandibular gland, sublingual gland
Parotid gland is in what capsule
CT capsule
What is found in the parotid gland
Unilocular adipose tissue
The submandibular gland is a mixed gland that is mostly
Serous
What mucous units are found in the submandibular gland
Serous demilunes
What type of capsule surrounds submandibular gland
CT capsule
The sublingual gland is what type of gland
Mixed
Sublingual gland is primary made of
Mucous secretory units and a few serous units
The tongue is made up of
Skeletal muscle
Tongue is covered with
Keratinized stratified squamous epithelium
The anterior 1/3 of tongue contains what gland
Serous glands
The posterior 1/3 of the tongue has what type of gland
Mucous gland
The middle 1/3 of the tongue has what gland
Both serous and mucous gland
What are the four lingual papilla of the tongue
Filiform, fungiform, circumvallate, foliate
What are filiform lingual papilla
Made up of keratin of epi and lack taste buds
What is the most numerous lingual papilla
Filiform
The fungiform papillae are scattered among
Filiform papillae
Describe fungiform papillae
Shaped like mushroom with narrow stalk and dilated upper portion
What lines the fungiform papillae
Nonkeratinized stratified squamous epithelium and is highly vascularized
Are taste buds present in fungiform papillae
Yes
Where are circumvaliate papillae found
Along the sulcus terminalis
What is in circumvaliate papillae
Taste buds and von Ebner’s glands
Function of von Ebner’s glands
Secrete lipase
Where are foliate papillae found
Dorsal lateral surface of tongue
The foliate papillae form what
Two parallel rides with serous glands in between the ridges
Are taste buds present in foliate papillae
Yes
Taste buds are
Chemoreceptors
Taste buds rest on
Basal lamina
What covers taste buds
Epithelium except at a small opening
What is the small opening called of the taste bud
Taste pore
What are the three types of cells seen in taste bud
Type 1, type 2, and basal cells
Type one cells of taste buds are
Dark staining support cells
Type 2 cells of taste buds are
Light staining neuroepithelial cells
Basal cells of taste buds are
Parent cells for the Type 1 and type 2 cells
What makes sour in taste buds
H+
What makes bitter in taste buds
OH-
What makes salty in taste buds
Na+ and Cl-
What makes sweet in taste buds
Glucose
Fungiform papillae are rich in
Blood supply