Comparative Dig Tract of Head and Neck Flashcards
The ventral part of the face is formed by?
Oral cavity (Viscerocranium-splanchnocranium)
The roof of the oral cavity is the made from the _______________
Palate
The mandible and symphysis make up what part of the oral cavity?
The floor
The part between the lips and the dental arcade is called?
Vestibule - labial + buccal parts
Inside the dental arcade, the space is termed:
Oral cavity proper
What attaches the tongue to the floor of the oral cavity?
Frenulum
The rima oris are what part of the mouth?
Lips
The division of the lips that extends from the nose to the oral fissure is called?
Philtrum
The two types of salivary glands are __________ and ___________
serous and mucuous
What is the landmark for the excretory duct located sublingually?
Sublingual caruncle
List the salivary glands
- parotid
- mandibular
- sublingual
- zygomatic
- buccal
Which salivary gland empties at the level of PM 4
Parotid gland
Salivation, Digestion and Defense are function of?
Salivary glands
Salivary glands can empty into what 2 spaces of the oral cavity?
The vestibule or the proper
What structure is involved in apprehension, drinking, mastication, deglutition, and taste?
Tongue
What two structures attach the tongue?
Hyoid and frenulum
Which muscle supports the mandible and the tongue?
Myohyoideus
The sensory organ associated with the tongue:
taste buds
T/F sensory cells in taste buds regenerate
False - they are post mitotic
Which structure defines the caudal border of the oral cavity?
Palatoglossal arch
Describe the glossal innervation
Motor: CN 12 (hypoglossus)
Sensory: V3, 7, 9,10
The intrinsic muscle of the tongue is the:
Lingualis proprius
List the 3 extrinsic muscle of the tongue
- genioglossus
- styloglossus
- hyoglossus
Filiform and conical papillae are mechanical or gustatory?
Mechanical
What are the 3 gustatory papillae?
Foliate, vallate, fungiform
What is a structure unique to the bovine tongue?
Lingual torus with fossa
The hyoid apparatus is a derivative of what embryonic structure?
Branchial apparatus
The ___________ separates the digestive from the respiratory tract.
Larynx
The Cavity connecting the nasal cavity to the larynx and the oral cavity to the esophagus is the:
pharynx
What is the attachment of the pharynx?
Deep fascia of the head
In between what structures is the laryngopharynx?
Piriform recesses
What is the pathology associated with the pharynx in equine?
Dorsal displacement of soft pallate / hypoplastic entrapment
The 2 muscles of the soft palate are ?
- tensor veli palatini
- levator veli palatini
What is the only dilator of the pharynx?
Stylopharyngeus caudalis
The diverticulum of the auditory tube is ______________
Guttural pouch
What does the auditory tube connect?
The middle ear cavity with the nasopharynx
Delineate the limits of Viborg’s Triangle
- Sternomandibular mm
- Linguofacial v
- Ramus of the mandible
The first line of defense of lymphatic tissue in the mouth is the ?
Tonsil
In bovine, what is a species-specific structure associated with the tonsils?
The palatine tonsil has a sinus
List some locations of the tonsils
- palatine
- lingual
- soft palate tonsil
- pharyngeal
- tubal
What is the organ involved in deglutition and vocalization?
Larynx
Describe the blood supply to the larynx
Cranial/Caudal laryngeal a
What LN are associated with the larynx?
Retropharyngeal ln
The entrance to the larynx is termed the _____________
Additus
Which laryngeal cartilage is elastic?
Epiglottic
List the 4 cartilages of the larynx
- epiglottic
- thyroid
- cricoid
- arytenoid
Thyrohyoideus and sternothyroideus are intrinsic or extrinsic muscles of the larynx?
Extrinsic
Caudal laryngeal nn is the terminal branch of the __________________ nn, which are a branch of CN 10
Recurrent laryngeal nn
How do you compensate in ET placement in horses?
By lifting the head
Which muscle of mastication opens the oral cavity?
Digastricus
What muscle helps coordinate mastication with the tongue?
Buccinator
The coordinated actions of the muscles of the tongue and pharynx will allow _____________
Deglutition (swallowing)
Where are the receptors that initiate the swallowing reflex?
In the soft palate
The epiglottis closes the entrance to the larynx by doing what?
retroflexing from the intrapharyngeal ostium
The infection of S. equii in foals that is associated with the thickening of the retropharyngeal LN is termed:
Strangles
Describe the location of the esophagus
Dorsal to trachea then veers Left before entering thoracic cavity
Describe the musculature of the esophagus
- striated
- INvoluntary
