Test 3 Histology Gi System

Front 1

What are the layers that make up the lining of the oral cavity?

Back 1

1. Mucosa
2. Submucosa

Front 2

The mucosa of the oral cavity consists of a _______ epithelium and a ________ of ____ CT.

Back 2

stratified squamous NONkeratinized epithelium
Lamina Propria of Loose CT

Front 3

Deep to the mucosa in the oral cavity is the ____. This consists of a layer of ___ that contains _____ glands.

Back 3

Submucosa
Connective Tissue
Muco-serous Glands (secrete mucous and serous)

Front 4

The outer surface of the lip is skin (epidermis and dermis). What is the core of the lip made up of? What is the inner surface?

Back 4

Core- Orbicularis Oris (skeletal muscle)
Inner surface- Oral Mucosa

Front 5

What kind of glands are in the oral mucosa of the lip?

Back 5

Labial Glands
(Situated between the mucosa and the orbicularis oris muscle.)

Front 6

What is the vermillion border and where is it found?
What is another name for it and why is it called this?

Back 6

This is a transition from skin to the mucosa of the oral cavity.
Also called the red margin because it is thin and the high dermal papillae here carry blood close to the surface giving it it's red color.

Front 7

What is the structure of the epithelial lining of the red margin?
How is the lamina propria of the red margin different than in other parts of the lip?

Back 7

The epithelial lining of the red margin is lightly keratinized.
The lamina propria in the red margin does not have glands.

Front 8

The epithelium of the mucosa of the tongue is what type?

Back 8

Stratified squamous non-keratinized to keratinized.

Front 9

What epithelial layer is mainly responsible for forming papillae on the dorsal surface of the tongue?

Back 9

Stratum Corneum

Front 10

If you burn your tongue, which layer of epithelium are you most likely damaging?

Back 10

Stratum Corneum

Front 11

Papillae have a small core of CT coming from what layer?

Back 11

Lamina Propria of Mucosa (which makes sense because the lamina propria is made of loose CT)

Front 12

The papillae contain receptors for what?

Back 12

Taste (Taste Buds)

Front 13

What are the four types of papillae?

Back 13

1. Filiform Papillae
2. Fungiform Papillae
3. Foliate Papillae
4. Circumvallate Papillae

Front 14

What do Filiform Papillae look like?

Back 14

Elongated and partially keratinized. They look little flames and are very abundant.

Front 15

Where are Filiform Papillae located?

Back 15

They cover the dorsal surface of the anterior two-thirds of the tongue.

Front 16

Do the Filiform Papillae contain taste buds?

Back 16

No.

Front 17

What do Fungiform Papillae look like? Where are they found on the tongue?

Back 17

Mushroom Shaped.
Scattered over the dorsal surface of the tongue.

Front 18

Do Fungiform Papillae contain taste buds?

Back 18

Yes

Front 19

Which type of Papillae is uncommon in adults and seen more often in children?

Back 19

Foliate Papillae

Front 20

Where are Foliate Papillae located?

Back 20

On the posterolateral margin of the tongue.

Front 21

Do the Foliate Papillae contain taste buds?

Back 21

Yes

Front 22

What do Circumvallate Papillae look like?

Back 22

They are very large (about 4 times as large as the other papillae) and tooth shaped. They are surrounded by a groove or moat.

Front 23

Where are Circumvallate Papillae located?

Back 23

These lie along the sulcus terminalis which is like a line that divides the anterior two-thirds of the tongue from the posterior one-third.

Front 24

About how many Circumvallate Papillae are on a tongue?

Back 24

Only about 7-12.

Front 25

Where are the Glands of Von Ebner located?

Back 25

In the Lamina Propria (which is the loose CT part of the mucosa) deep to Circumvallate Papillae.

Front 26

What do the Glands of Von Ebner do?

Back 26

They are serous secreting glands that secrete into the moats surrounding Circumvallate Papillae. They wash away tastes so that you dont taste what you ate a long time ago.

Front 27

What might cause food to become lodged in the moats surrounding Circumvallate Papillae?

Back 27

If the Glands of Von Ebner are not secreting properly, they wont be able to wash food out of the moats.

Front 28

Do the Circumvallate Papillae have taste buds?

Back 28

Yes

Front 29

Which types of Papillae have taste buds? Which don't?

Back 29

DO have tastebuds:
Fungiform Papillae
Foliate Papillae
Circumvallate Papillae
DON'T have tastebuds:
Filiform Papillae

Front 30

What is the structure of a taste bud?

Back 30

Taste-buds are barrel shaped structures that extend through the full thickness of the epithelium.

Front 31

What is the opening into the taste bud called?

Back 31

Taste Pore

Front 32

What are the cell types found inside the taste bud?

Back 32

1. Neuroepithelial taste cells
2. Basal Cells
3. Sustentacular Cells

Front 33

What is the function of Neuroepithelial Taste Cells in the Taste Buds? How do they transmit information to the CNS?

Back 33

Act as chemoreceptors.
Transmit info to the CNS via the Facial Nerve (12) and the Glossopharyngeal Nerve (9).

Front 34

What is the function of the Basal cells in the taste bud? With this in mind, what layer are they usually located in?

Back 34

Basal cells can differentiate into the taste cells. They are usually found at the base of the taste bud in the Stratum Basale.

Front 35

How are the muscles of the tongue structured?

Back 35

The intrinsic muscles of the tongue are bundles of skeletal muscle that run in longitudinal, transverse, and vertical directions so that the shape of the tongue can be altered in many directions.

Front 36

Small amounts of _____ are found amoung the muscle fiber groups of the tongue as well as minor glands that are predominately _____ secreting.

Back 36

Adipose tissue
Serous secreting

Front 37

These are rounded masses of lymphatic tissue that cover the posterior third of the tongue.

Back 37

Lingual Tonsils

Front 38

What is the part of the tooth that projects above the gingiva?

Back 38

Crown

Front 39

What is the name of the mucous membrane that is attached to the alveolar periosteum and surrounds the neck of the tooth?

Back 39

Gingiva

Front 40

What is the part of the tooth that projects below the gingiva?

Back 40

Root

Front 41

What is the name for the junction between the crown and the root of a tooth?

Back 41

Neck

Front 42

The roots of the teeth are embedded in the _____ ____ of the ____ and ____.

Back 42

Alveolar Bone
Mandible
Maxilla

Front 43

The pulp makes up the ___ of the tooth. It is made of ____. Where is it found?

Back 43

The pulp makes up the core of the tooth. It is made of loose CT and is found in the Pulp Cavity.

Front 44

What is contained in the pulp of the tooth? How do these structures enter the pulp cavity?

Back 44

The pulp contains nerves (for pain) and blood vessels.
These enter through the apical foramen which is the opening into the pulp cavity (located at the base of the root).

Front 45

What covers the pulp of the tooth?

Back 45

A calcified tissue- Dentin

Front 46

____ is the second hardest substance in the body.

Back 46

Dentin

Front 47

What covers the dentin at the crown of the tooth?
At the root?

Back 47

Enamel at the crown
Cementum at the root

Front 48

What type of cells line the pulp cavity? What do these cells do?

Back 48

Odonotoblasts
Make dentin.

Front 49

What happens to the pulp cavity with age?

Back 49

The pulp cavity gets progressively smaller with age. (Dentin formation continues throughout life but decreases with age.)

Front 50

This part of the tooth is sensitive to touch, cold, and acid.

Back 50

Dentin

Front 51

Can dentin persist without odonotoblasts?

Back 51

Yes

Front 52

What is the hardest substance in the body?

Back 52

Tooth enamel

Front 53

What do ameloblasts do and where are they located?

Back 53

Make enamel.
Ameloblasts cover the surface of the developing tooth.

Front 54

When do you have ameloblasts?

Back 54

Only on the surface of the developing tooth. They die once the tooth erupts from the gingiva.

Front 55

Cementum is similar in structure and composition to what?

Back 55

Primary Bone

Front 56

What cells make cementum and where are they located?

Back 56

Cementoblasts
Located against the periodontal ligament (which is what attaches the root to the alveolar bone).

Front 57

What are the cells within the cementum called?

Back 57

cemetocytes

Front 58

What kind of fibers make up the Periodontal Ligament? What does this ligament do?

Back 58

Collagen Fibers
These attach the cementum to the adjacent bone of the jaw.

Front 59

When your baby teeth are hanging by a string, what is the string?

Back 59

Periodontal Ligaments

Front 60

What is this structure?

Back 60

Lip

Front 61

What types of Papillae can be seen here?

Back 61

Fungiform Papillae and Filiform Papillae

Front 62

What is the overall structure here?
What sub-structures are in the boxes?

Back 62

Circumvallate Papillae
Von Ebner's Glands (serous only)

Front 63

What structure is shown here?

Back 63

Developing Tooth

Front 64

What are the structures numbered?

Back 64

1. Enamel
2. Ameloblasts
3. Dentin
4. Odontoblasts
5. Developing Pulp Cavity

Front 65

What are the structures numbered?

Back 65

1. Enamel
2. Ameloblasts
3. Dentin
4. Odontoblasts
5. Developing Pulp Cavity

Front 66

What are the structures within the box?

Back 66

Taggable:
Enamel
Dentin
Pulp