Salivary Glands

Question 1

Surface projection of parotid gland

Answer 1

• Pyramidal-shaped, salivary gland with dense capsule
• Superficial part anterior to auricle
• Deep part posterior and medial to ramus of mandible
• Connected with vestibule of oral cavity by parotid duct

Question 2

Surface projection of submandibular gland

Answer 2

• “C” shaped salivary gland (around posterior edge of mylohyoid muscle)
• Has capsule
• Has superficial and deep parts
• Has single duct

Question 3

Parotid gland

Answer 3

• Pyramidal-shaped salivary gland with dense capsule
• Connected with vestibule of oral cavity by parotid duct
• Produces and secretes components of saliva
• Produces 25-30% of saliva
:
• Serous secretions only

Question 4

Submandibular gland

Answer 4

• “C” shaped salivary gland (around posterior edge of mylohyoid muscle)
• Has capsule
• Produces and secretes components of saliva
• Produces 60-70% of saliva
• Serous (primarily) and mucous secretions

Question 5

Parotid duct

Answer 5

• Passes anteriorly on external surface of masseter muscle
• Connects parotid gland with vestibule of oral cavity
• Transports parotid gland secretions
• Ends in vestibule of oral cavity opposite 2nd maxillary molar

Question 6

Masseter m.

Answer 6

• Elevation of mandible (e.g., closing mouth)
• Protraction of mandible
• Trigeminal nerve (mandibular division - CN V3)

Question 7

Buccal fat pad

Answer 7

• Globular, encapsulated fat body
• Prominent in infants
• Prevents collapse of cheeks during suckling

Question 8

Mandible

Answer 8

• U-shaped bone
• Each side consists of body (horizontal) and ramus (vertical) with coronoid and condylar processes
• Mental protuberance forms point of chin
• Contains alveoli (“sockets”) for teeth
• Contributes to temporomandibular joint (TMJ)

Question 9

Gingivae

Answer 9

• Composed of non-glandular oral mucosa
• Covers alveolar processes of mandible, and maxilla, and necks of teeth
• Food and bacteria between gums and teeth can cause inflammation (gingivitis)

Question 10

Mylohyoid m.

Answer 10

• Elevation of floor of mouth
• Trigeminal nerve (mandibular division - CN V3)
• Four suprahyoid muscles: digastric, geniohyoid, mylohyoid, and stylohyoid
• A raphe is a “seam” where two structures meet

Question 11

Sublingual gland

Answer 11

• Flat, thin, almond-shaped salivary gland
• Does not have capsule
• Multiple ducts
• Produces and secretes components of saliva
• Produces 3-5% of saliva
• Mucous (primarily) and serous secretions

Question 12

Lingual n.

Answer 12

• General sensation
• Special sensation
General sensation:
• Anterior 2/3 of tongue
Special sensation:
• Taste from anterior 2/3 of tongue (lingual nerve > chorda tympani nerve > facial nerve)
• Lingual nerve is branch of mandibular nerve (CN V3)

Question 13

Submandibular duct

Answer 13

• Opens into oral cavity proper
• Ends at sublingual papilla on frenulum of tongue
• 5 cm in length
• Transmits submandibular gland secretions
• Lingual nerve “loops” under duct

Question 14

Sublingual papilla

Answer 14

• Paired, small, fleshy, raised mound

* Has opening(s) for submandibular duct