Divisions of the pharynx

Question 1

Where is the nasopharynx located?

Answer 1

• Above soft palate.
• from choanae to the posterior wall of the superior constrictor.
• • auditory tube opens in postero-lateral aspect
• -orfice reinforced by cartilage, torus tubarius
• Salpingopharyngeal fold raised by salpingopharyngeus m.
• levator palatini
• Pharyngeal recess

Question 2

What is the function of levator palatini?

Answer 2

Raises ridge seemingly coming out of the of the orfice of auditory tube

• Works in conjunction with tensor palatini which lies posterior to the margin of the medial pterygoid plate.
• Together they tens soft palate and seal Naso from oropharynx during swallowing preventing constrictors from forcing bolus into nasal cavity

Question 3

What is the pharyngeal recess site of?

Answer 3

located posterior to the torus and is the site of pharyngeal tonsils (Adenoids)
-guards junction of nasal cavity and gut

Question 4

Oropharynx Boundaries and location

Answer 4

Soft palate to level of hyoid.

-Found from palatoglossal folds (Palatoglossal arch) to constrictors posteriorly.

Question 5

Palatine tonsils are:

Answer 5

In hollow immediately post to palatoglossal fold and anterior to palatopharyngeal fold (Pouch between 2nd and 3rd arch)
-Guards function between oral cavity and gut

Question 6

Sulcus terminals and foramen caecum set boundaries to?

Answer 6

the anterior 2/3 of the tongue and posterior 1/3 or the separation of the oral cavity from the gut.
-The nerve supply to tongue changes here; voluntary to involuntary control occurs here for example gag reflex is initiated posterior to this line.

Question 7

Lingular tonsils (lingual follicles) is found on?

Answer 7

found on the posterior 1/3 of the tongue

it forms the floor of the ring of lymphoid tissue guarding junction of the oral-nasal cavities of the gut

Question 8

Laryngopharynx is the pharynx from and to what:

Answer 8

From hyoid to lower border of cricoid

-lateral and posterior to the larynx

Question 9

What is the piriform recess?

Answer 9

Its the channel between middle and inferior constrictors of lateral walls of larynx
-Its a channel for saliva (Maybe be only channel for food and fluids in animals with epiglottis extending into the nasopharynx.