Oral Cavity And Pharynx

Question 1

Hard Palate is which part of mouth? Soft palate?

Answer 1

Anterior 2/3; posterior 1/3

Question 2

What is the opening of oral cavity to oropharynx?

Answer 2

Fauces

Question 3

What are the two folds that separate the oral cavity from oropharynx? What is in between the folds?

Answer 3

The glossopalatine fold is in front, with palatine tonsils in middle, followed by pharyngopalatine fold next

Question 4

What connects tongue to oral cavity?

Answer 4

Lingual Frenulum

Question 5

What is important about lingual frenulum?

Answer 5

If it is too short, babies can have issues with breastfeeding and talking

Question 6

What is on posterior surface of tongue?

Answer 6

Lingual tonsils

Question 7

Parotid Gland-location and where it runs

Answer 7

Over masseter, runs duct through buccinator m into oral cavity behind 2nd molar

Question 8

Submandibular glands-Location and runs where?

Answer 8

Under mandible, duct through papilla in floor of mouth to lateral sides of lingual frenulum

Question 9

Sublingual glands: location and where they run

Answer 9

Inferior of tongue, tiny sublingual ducts that open onto inferior oral cavity

Question 10

Function of Saliva

Answer 10

Moistens food,
helps break down,
Abs present,
Food dissolved

Question 11

Teeth-Enamel?

Answer 11

Cap over dentin-what we see in our mouth

Question 12

Teeth-roots?

Answer 12

Run from pulp, located within dentin.

-run into dental alveolus containing n, a, v

Question 13

Periodontal Ligament

Answer 13

Connects dentin to alveolar canal

Question 14

How many teeth do you start with? How many do you end with?

Answer 14

Start with 20 deciduous teeth, end with 32 permanent teeth

-last ones are wisdom teeth, in early 20s

Question 15

Muscles of cervical Viscera

Answer 15

Levator veli palatini-elevates soft palate
-CN X (PA4)

Tensor Veli Palatini-tenses soft palate
-CNV3 (PA1)

Stylopharyngeus-elevates pharynx
-CN IX-(PA3)

Superior, Middle and Inferior pharyngeal constrictor
-CNX (PA4)

Question 16

Where is the Superior Pharyngeal Constrictor in relation to buccinator?

Answer 16

The pterygopharyngeal raphe separate the two, so the buccinator is more anterior

Question 17

Tonsillectomy

Answer 17

There are a lot of arteries and nerves around here, main one is glossopharyngeal behind!

A lot of times dentist will take out pharyngeal tonsils as well

Question 18

What is behind palatine tonsils?

Answer 18

Glossopharyngeal N

Question 19

What happens if you have paralysis of palatini muscles?

Answer 19

So Tensor veli palatini and Levator veli palatini tense and pull up your soft palate to protect your nasopharyngeal cavity/pharyngotympanic tube
-IF CN IX or X are affected, these muscles don’t work and end up with food in reflux

Question 20

Stages of Swallowing

Answer 20

1. Bolus compressed and pushed into oropharynx
   - voluntary-tongue and soft palate
2. Soft palate elevated (Levator veli palatini), pharynx widens and shortens as suprahyoid m and pharyngeal muscles contract
   - involuntary
3. Sequential Contraction of pharyngeal constrictors to move food down esophagus
   —CNX

Question 21

Pharyngeal Plexus provides sensation to?

Answer 21

Oropharynx and Laryngopharynx by IX and X

Question 22

Nasopharynx and pterygotympanic tube and torus tuberus get sensation from?

Answer 22

CN V2