Saliva and Salivary Glands Flashcards
What are the three main Salivary Glands?
What % of salivary flow are they responsible for?
Parotid, Submandibular, Sublingual glands
80%
What produces 20% of saliva?
Where are these found?
Minor salivary glands
Submucosa of Oral mucosa
Two types of epithelial tissue in salivary glands?
Acinar cells
Ducts
What do Acinar cells do?
Produce fluid for saliva
What allows the transport of fluid and electrolytes in salivary glands?
Channels and transporters in the apical and basolateral membranes
Two types of Acinar cells?
Serous acinus and Mucous acinus
What does the Serous acinus do?
Secretes water + amylase
What type of acinus does the Parotid gland contain?
Serous acini
What type of Acinus cells are in the Submandibular and Sublingual glands?
What is the name for this?
Both Serous and Mucousa Acinus
Seromucous
Two types of Ducts in Salivary glands?
Intralobular and main excretory
Two types of Intralobular ducts?
Striated and Intercalated
What do Intercalated ducts do in the Salivary glands?
Connect Acini to larger striated ducts
What is the function of Striated ducts in the salivary glands?
Reabsorption of NaCl
What is Primary saliva made up of?
NaCl rich isotonic plasma-like fluid secreted by acini
What do the Ducts secrete and reabsorb?
Secrete K+ and HCO3-
Reabsorb Na+ and Cl-
What does the Epithelium of Duct do that makes Final saliva Hypotonic (Less tension)?
Doesn’t allow the movement of water
Where do the Parotid glands lie?
Superificialy between the Zygomatic arch, Sternocleidomastoid and Ramus of Mandible
What is the name of the Parotid duct?
Where does it lie?
Stenson’s duct
Crosses masseter, Pierces buccinator and enters oral cavity at 7/7
What is the Buccinator muscle?
Muscle lining the cheek
What are the 4 structures that pass through the parotid gland?
External carotid artery and terminal branches
Retromandibular vein
Facial nerve + branches
Parotid capsule
Horizontal structure of Parotid gland?
Triangular
What are the two lobes that make up the Submandibular gland?
What separates the two lobes?
Superficial lobe and deep lobe (Floor of mouth
Mylohyoid muscle
Name of submandibular duct and where it empties into the oral cavity?
Whartons duct
Sublingual papillae
Where does the Submandibular duct begin?
Superficial lobe
Where are the sublingual glands located?
Between Mylohyoid muscle and oral mucousa of the floor of the mouth
Where does the Sublingual gland drain into? Why?
Drains into submandibular
Has no large duct
Where are the Minor salivary glands concentrated?
Buccal labia
palatal
Lingual regions
What types of acinus are Minor salivary glands?
Which one is different?
All minor salivary glands are mucous
Glands of Von ebner - Serous
What does innervation of sympathetic and parasympathetic glands cause in the Salivary glands? (both do different things)
Parasympathetic- Production of saliva
Sympathetic- Secretion of protein and glycoprotein
What nerve sends parasympathetic fibers to:
1)Parotid gland
2)Submandibular and sublingual
1)Glossopharyngeal nerve
2)Chorda tmpani (branch of facial nerve)
What does sympathetic nerves innervate the
1)Parotid gland
2)Sublingual and submandibular glands
1)Auriculo-temporal nerve
2)Lingual nerve branch of facial nerve
3 functions of Saliva
Oral hygeine
Maintaining oral pH
Digestive enzyme
Flow rate of saliva ml/min?
Daily secretion?
0.3 to 7ml
800-1500ml
3 defence systems of oral cavity?
Mucousa
Palatine tonsils
Salivary glands
Which glands are constantly active?
Submandibular(dominates), sublingual and minor glands
Which gland is the main source of secretion when stimulated?
Parotid
