Chapter 88: Salivary Glands Flashcards
What are the four salivary glands?
parotid, mandibular, sublingual, zygomatic
Describe the parotid salivary gland?
Triangular gland superficial to the vertical ear canal. **difficult to remove as blends with many things. Duct enters just above PM4
Describe the zygomatic salivary gland?
Just ventral and rostrolateral to the globe of the eye, medial to the zygomatic arch. Major duct opens just caudal to last upper molar.
***Blood supply is infraorbital artery and venous drainage is deep facial vein.
Describe the mandibular and sublingual salivary glands?
Two intimately associated glands - mandibular is at caudomedial angle of mandible medial to the bifurcation of the linguofacial and maxillary veins.
The cranial border of the mandibular abuts the sublingual and they share a capsule.
Their shared duct opens at the sublingual caruncle lateral to the lingual frenulum.
Supplied by the glandular branch of facial artery.
Drains to medial retropharyngeal LN
Which salivary gland enters at the lingual caruncle?
At PM4?
Caudal to last molar?
Mandibular/ sublingual
Parotid
Zygomatic
What is the function of saliva?
lubricate ingesta
facilitate packaging of food as bolus
does NOT do major digestion of carbs
Minor things include cleansing oral cavity, thermoregulation, buffer for weak acids, reduce bacterial growth, and protect epithelium
Which salivary glands are more serous?
More mucinous?
Serous: parotid, mandibular
Mucinous: sublingual, zygomatic
The sublingual salivary gland has two portions, what are they and how do they differ?
Monostomatic - enters with mandibular duct
Polystomatic - empties directly into oral cavity
They have different blood supplies too