Wk 4 - salivary glands

Salivary glands

Exocrine glands that produce + empty saliva into the oral cavity via ducts

Aid digestion

Protect teeth from bacteria

Moisten food for swallowing

Where can salivary glands be found ?

In mucosa - moist inner lining of organs/body cavities

Oral cavity, palate, paranasal sinuses, pharynx, trachea, bronchi

How many salivary glands in the mouth and throat ?

750

Types of salivary glands

Mucous and serous

3 large paired salivary glands

Parotid

Submandibular

Sublingual

Parotid glands location

In front of the ear - Wedged between ramus of mandible and sternocleidomastoid muscle

Extended inferiorly from EAM to angle of mandible

Parotid glands appearance

Largest salivary gland

Contains fatty tissue and intraglandular lymph nodes - looks different than other salivary glands

Parotid duct

Stensen duct

Emerges from anterior edge of duct to oral cavity opposite the 2nd upper molar tooth

Passes under zygomatic arch

Parotid gland in axial view

Around where the ears are

Parotid gland in coronal view

Large circles on either side of neck, at ear height

How is the transducer positioned when scanning parotid glands?

Parallel to the ear, in front

Submandibular glands location

Border the posterior half of mandible

Extends from angle of mandible to level of the hyoid bone

Submandibular duct

Wharton duct

Opens into oral cavity on either side of lingual frenulum, posterior to teeth

Lingual frenulum

Small fold of mucous membrane at the midline, extending from the floor of the mouth to the under surface (bottom) of the tongue

Where is the transducer placed for submandibular scan?

Underneath the jaw line

How is visibility of salivary ducts improved?

Prior to scans patients consume something sour to increase production of saliva

Increased production = ducts dilate, easier to see

Coronal view of submandibular glands

Located on either side of tongue

Location of sublingual glands

Lie under the tongue on the floor of the mouth

Smallest salivary gland

Rivinus ducts

10-20 sublingual ducts open in a line along floor of the mouth

Bartholin duct

Fusion of rivinus ducts

Opens into or adjacent to submandibular duct

Where is the transducer placed to image sublingual glands?

Directly underneath the chin

Where are all salivary glands concentrated?

Floor of mouth and along jaw

Coronal view of sublingual glands from underneath chin

Glands are focused in a semi circle along bottom teeth