Salivary Glands Flashcards
Name the three types of oral mucosa
- Lining
- Masticatory
- Specialised (taste buds)
In general, what is the oral mucosa composed of
- Stratified squamous epithelium
- Lamina propria of dense connective tissue
- Submucosa of loose connective tissue
Where is lining mucosa found in the oral cavity
- Inside of the lips
- Buccal surfaces
- Soft palate
- Floor of the mouth
- Inferior surface of the tongue
Is the lining mucosa epithelium keratinised
No; however, the vermillion border of the lips is keratinised
Where is masticatory mucosa found in the oral
- Hard palate
2. Gingiva (gums around the teeth)
Is the masticatory mucosa epithelium keratinised
Yes
Is the dorsum of the tongue keratinised
Yes
Describe the different planes of the intrinsic muscles of the tongue
Skeletal muscle bundles in:
- Longitudinal,
- Transverse, and
- Vertical planes
Name the four types of papillae on the tongue
- Filiform (no taste buds)
- Fungiform
- Foliate
- Circumvallate
What is the diameter of the taste buds
These multicellular chemoreceptive units are around 50um in diameter
What are the 6 basic functions of saliva
- Protection
- Buffering
- Tooth integrity
- Antimicrobial activity
- Digestion
- Taste
How much saliva is secreted per day
600-1000ml per day
Name the 3 paired main salivary glands
- Parotid
- Submandibular
- Sublingual
Where are the minor salivary glands located
In the submucosa and have short ducts that open directly onto the mucosal surface
Where does the parotid duct enter the oral cavity
A papilla opposite the upper second molar tooth
What nerve innervates the parotid gland
Auriculotemporal nerve
Where does the submandibular duct enter the oral cavity
Terminates on the sublingual caruncle near the base of the lingual frenum
Describe the innervation to the submandibular gland
Submandibular ganglion
What cranial nerve innervates the submandibular gland
Facial nerve (CNVII)
Where does the sublingual duct enter the oral cavity
Anterior part = single duct that joins the submandibular duct
Posterior part = several small ducts that end on the sublingual fold
Describe merocrine secretion
Exocytosis: vesicles fuse with the cell membrane and discharge their contents to the extracellular space
Name the two types of duct
- Simple (duct is unbranched)
2. Compound (has a branching duct system)
What type of duct are salivary glands
Compound tubuloacinar glands
Name the classification of salivary glands
- Serous
2. Mucous
