Week Five

Question 1

What regions is the pharynx divided into?

Answer 1

-Nasopharynx
-Oropharynx
-Laryngopharynx ( AKA hypopharynx)

Question 2

What are the muscles of the pharynx?

Answer 2

-Superior pharyngeal constrictor
-Middle pharyngeal constrictor
-Inferior pharyngeal constrictor
-Stylopharyngeus
-Salpingopharyngeus
-Palatopharyngeus

Question 3

List the outer circular layer of muscles and their purpose

Answer 3

-Superior pharyngeal constrictor
-Middle pharyngeal constrictor
-Inferior pharyngeal constrictor

-CONSTRICT the pharynx in a sequential fashion to MOVE FOOD DOWN

THYROPHARYNGEUS…?????

Question 4

List the inner longitudinal muscles and their purpose

Answer 4

• Stylopharyngeus
• Salpingopharyngeus
• Palatopharyngeus
• SHORTENS and WIDENS the pharynx to get food away from the airway as soon as possible
  -Muscle fibres run longitudinally

Question 5

What are the sections of the inferior pharyngeal constrictor?

Answer 5

Thyropharyngeus and Cricopharyngeus

Question 6

What is the innervation of the muscles of the pharynx?

Answer 6

Pharyngeal plexus EXCEPT the stylopharyngeus (CN IX, glossopharyngeal)

Question 7

How many tonsils are there?

Answer 7

Three sets of tonsils

Question 8

Name the tonsils and their approximate location in the pharynx

Answer 8

1) Palatine
- Laryngopharynx

2) Pharyngeal (AKA adenoids)
- Nasopharynx

3) Lingual
- Oropharynx

Question 9

What is the purpose of velar closure?

Answer 9

-Important for speech and swallowing (don’t want food coming out your nose)

Question 10

List the muscles of the Velar (soft palate)

Answer 10

Elevators
- Levator veil palatini
- Musculus uvulae

Depressors
- Palatopharyngeus
- Palatoglossus
- Tensor veil palatini

Question 11

What CN innervates the velar muscles?

Answer 11

Pharyngeal plexus EXCEPT tensor veli palatini ( CN V trigeminal)