10. Oral Cavity Flashcards
dense connective tissue and non-keratinized stratified squamous epithelium
surrounds neck of teeth and covers alveolar processes
gingivae
anterior roof of mouth; bony shelf covered by dense CT tissue and non-keratizined stratified squamous epithelium
forms anterior 2/3 of roof of motuh; separates oral cavity from nasal cavity
hard palate
orm part of anterior walls of oral cavity; covered with keratinized stratified squamous epithelium
close oral cavity from nasal cavity
lips
3 pairs of large multicellular glands: parotid, sublingual, and submandibular
produce saliva
salivary glands
posterior roof of mouth formed from skeletal muscle and covered with non-keratizined stratified squamous epothelium; uvula hangs from this structure
forms posterior 1/3 of roof of mouth; helps close off openng to nasopharynx when swallowing
soft palate
hard structures projective from maxilla and mandible: incisors, canines, premolars, and molars
mastication
teeth
composed primarily of skeletal muscle and covered by stratified squamous epithelium; surface covered by papillae
pushes food against palate to turn it into a bolus; detects taste (via taste buds)
tongue
aggregates of partially encapsulated lymphatic tissue
detects antigens in swallowed food an drink and initiate immune response if necessary
tonsils
space between cheek and gums
space where ingested materials are mixed with saliva and mechanically digested
vestibule
small, conical, muscular projection extending from soft palate
assists solft palate in closing off entryway to nasopharynx when swallowing
uvula
Characterize the anterior/posterior ends of the palate.
- anterior = hard and bony
- psterior = soft and muscular (skeletal)
- Where does the uvula extend?
- How does it function?
- Extends inferiorly from posterior part of soft palate
- Swallowing: soft palate and uvula elevate to close opening of nasopharyx
opening between oral cavity and oropharynx
fauces
boundaries of the fauces
glossopalatine arch (anterior fold) and pharyngopalatine arch (posterior fold)
Where are the palatine tonsils?
between the glossopalatine and pharyngopalatine arch
Label structures.
Label structures.
cell type of tongue
skeletal muscle and lightly keratinized stratified squamous epithelium
functions of the tongue
- manipulates/mixes ingested material during chewing
- compress partially digested materials against palate (to form bolus)
- role in swallowing
globular mass of partially digested material
bolus
inferior surface of tongue attaches to floor of oral cavity by thin vertical mucus membrane called ____
lingual frenulum
small projects that cover the superior (dorsal) surface of the tongue
papillae
posterior surface of the tongue contains ____
lingual tonsils
fluid that assists in initial activities of digestion
saliva
How much saliva is secreted in a day? When is it most produced?
- Between 1.0-1.5. daily
- Most produced during meal time (small amounts continuously to ensure moist)
99% of volume of saliva
water
3 pairs of salivary glands
- parotid
- submandibular
- sublingual
Label structures.
largest salivary glands
parotid glands
[located anterior and inferior to ear overlying masseter muscle]
produce 25-30% saliva (through parotid duct to oral cavity ia oral vestibule next to 2nd upper molar)
produces most of the saliva (60-70%)
submandibular glands
[located inferior to the body of the mandible]
duct opens from eah gland through papilla in the floor of the mouth on lateral sides of the lingual frenulum
contribute only 3-5% of total saliva
sublingual glands
[located inferior to tongue and internal to the oral cavity mucosa]
extends multiple tiny sublingual ducts that open onto inferior surface of oral cavity, posterior to submandibular dut papilla
types of secretions: parotid glands
serous secretions
types of secretions: submandibular gland
mucous and serous secretions
types of secretions: sublingual gland
both mucous and serous secretions
dentition; responsible for ingestion and mastication (first part of mechanical digestion process)
teeth
components of the tooth
- exposed crown
- constricted neck
- one or more roots that anchor it to the jaw
dental alveoli
- sockets within alveolar processes of both maxillae and mandible
- “roots of teeth fit into dental alveoli”
gomphosis joint
- roots
- dental alveoli
- periodontal ligament
binds teeth roots to the alveolar processes
periodontal ligament
Label.
teeth
Label the teeth.
Phases of swallowing
Name components of alimentary layer.
Label.
Label.
Label.
Label.
Alimentary layer of the cervical viscera
tonsillectomy
tenses soft palate and acts on pharyngotympanci tube for depressurizing middle ear
tensor veli palatini (CN V - V3)
elevates the tensed palate and acts on pharyngotympanic tube
levator. veli palatini (CN X - pharyngeal plexus)
paralysis of tensor veli palatini and levator veli palatini
leads to reflux of oral contents into nasal cavity and pharyngotympanic tube dysfunction
anatomy of swallowing
relational anatomy of pharynx
