Oral Cavity

Question 1

two regions of oral cavity

Answer 1

• vestibule: space between lips and teeth
• oral cavity proper

Question 2

hard palate

Answer 2

anterior 2/3, palatine processes of maxillae bones and palatine bones

Question 3

soft palate

Answer 3

posterior 1/3, muscular, soft tissue

Question 4

uvula

Answer 4

extends posteriorly from soft palate, elevates during swallowing to close off posterior entrance to nasopharynx

Question 5

tongue

Answer 5

primarily skeletal muscle - large and strong

Question 6

lingual frenulum

Answer 6

attachment point underneath the tongue

Question 7

papillae

Answer 7

bumps on surface of tongue (taste buds)

Question 8

tongue function

Answer 8

manipulates and mixes ingested materials, assists in swallowing

Question 9

salivary glands (chemical digestion)

Answer 9

produce and secrete saliva into the oral cavity

Question 10

saliva functions

Answer 10

• moistens ingested materials to become a slick bolus
• moistens, cleanses, and lubricates oral cavity structures
• dissolves food so taste receptors on tongue can be stimulated

Question 11

3 pairs of extrinsic salivary glands make majority of saliva..

Answer 11

• parotid glands
• submandibular glands
• sublingual glands

Question 12

parotid salivary glands

Answer 12

• secrete 25-30% of total saliva
• largest salivary gland
• located anterior and inferior to ear

Question 13

parotid duct

Answer 13

parallel to zygomatic arch, pierces buccinator muscle before opening into mouth near upper 2nd molar

Question 14

submandibular salivary glands

Answer 14

• produce 60-70% of total saliva (most active)
• inferior to body of mandible

Question 15

submandibular duct

Answer 15

opens in the floor of the mouth next to lingual frenulum (duct when gleeking occurs)

Question 16

sublingual salivary glands

Answer 16

• contribute 3-5% of total saliva
• inferior to tongue, not active
• contain multiple, tiny sublingual ducts that open onto the inferior surface of oral cavity

Question 17

teeth

Answer 17

collectively known as dentition

Question 18

crown

Answer 18

superficial to gums
- enamel: white part

Question 19

neck

Answer 19

start of gum line

Question 20

root

Answer 20

imbedded in bone

Question 21

gingiva

Answer 21

gums

Question 22

dentin

Answer 22

most tooth mass, surrounds pulp cavity

Question 23

pulp cavity

Answer 23

large space, houses arteries/veins/nerves

Question 24

root canal

Answer 24

opening in roots that allow arteries/veins/nerves to branch off

Question 25

mesial surface

Answer 25

surface away from back molar

Question 26

distal surface

Answer 26

surface facing toward back molar

Question 27

buccal surface

Answer 27

surface that touches teeth from cheek

Question 28

labial surface

Answer 28

outer surface of teeth touching lips

Question 29

lingual surface

Answer 29

inner surface of each tooth touching tongue

Question 30

occlusal surface

Answer 30

chewing surface of molars

Question 31

deciduous (baby) teeth

Answer 31

20, erupt between 6-30 months

Question 32

permanent teeth

Answer 32

32, replace deciduous teeth

Question 33

incisors

Answer 33

most anterior, shaped like chisels for slicing

Question 34

canines

Answer 34

posterolateral to incisors, pointed for puncturing and tearing

Question 35

premolars

Answer 35

posteriolateral to canines, have flat crowns with ridges for crushing and grinding

Question 36

molars

Answer 36

thickest and most posterior tooth, also adapted for crushing and grinding