salivary glands anatomy Flashcards
(19 cards)
function of salivary glands?
produce saliva and release it via opening or ducts
types of salivary glands?
intrinsic: 500-1000 and small, within the mucosa or submucosa of oral cavity, tongue, oropharynx, upper respiratory system.
Extrinsic: 3 pairs and are found outside oral cavity and drain via ducts.
how are intrinsic salivary glands named?
based off their location- exception is salivary glands of the tongue known as van Ebner glands.
what do intrinsic salivary glands release predominantly?
mucous secreting expect van Ebner’s glands which are mainly serous.
what is the innervation of intrinsic salivary glands?
parasymp innervation by facial nerve
Where are von ebners glands located?
scattered between muscles of oral tongue and open into moats around vallate papilla and foliate papilla.
what are the 3 pairs of extrinsic glands and their secretion?
parotid gland: serous producing sits anterior to the ear over the mandible and lateral to masseter and mandible.
submandibular is mixed; serous and mucous producing and sits over the corner of the angle of mandible medial to body of mandible.
sublingual produces mucous and sits beneath the tongue on the floor of oral cavity.
what covers the parotid gland?
parotid capsule which is an extension of deep cervical fascia.
what passes through parotid gland?
external carotid artery, retromandibular vein and facial nerve.
what is the route of parotid duct?
leaves the gland anteriorly, crosses the superficial surface of masseter, pierces buccinator to empty into the vestibule adjacent to the second molar into parotid papilla.
what is an accessory parotid gland?
some people have it which is separate from the main gland and extends from the duct.
innervation of parotid gland?
parasymp: glossopharyngeal CN IX (otic ganglion), via auriculotemporal nerve which is a branch of mandibular division of trigeminal nerve.
symp: from external carotid plexus
sensory: from auriculotemporal nerve and greater auricular nerve which is a branch of cervical plexus.
how many parts does submandibular gland have?
two-superficial and deep parts as it wraps around the posterior border of mylohyoid muscle.
how does the submandibular gland transfer the secretions?
via subman duct-which opens into the sublingual papilla in the oral cavity proper.
innervation of submandibular g?
parasymp from chorda tympani i.e. facial nerve CN VII hitchhiking via lingual nerve.
symp from external carotid plexus,
sensory from lingual nerve branch of trigeminal CNVIII.
sublingual gland exact location?
between oral mucosa of the floor of the mouth and mylohyoid muscle, in sublingual fossa.
how does sublingual g transfer secretions?
via 8-20 ducts that open into sublingual fold in oral cavity proper
innervation of sublingual g?
parasymp from chorda tympani i.e. facial nerve CN VII hitchhiking via lingual nerve.
symp from external carotid plexus,
sensory from lingual nerve branch of trigeminal CNVIII.
