Md1 Histology Block 3 Digestive System 1

Front 1

.ORAL CAVITY

Back 1

.a stratified squamous epithelium
(Non keritanized in general)

with a submucosa present only in certain regions.

Front 2

.ORAL MUCOSA
3ct

Back 2

.Epithelium is non-keratinized stratified squamous
Lamina propria
Submucosa

Front 3

.ORAL MUCOSA exception =

Back 3

.Epithelium is non-keratinized stratified squamous except that keratinization occurs on outer margin of lip (
vermilion border),
gingiva,
hard palate
filiform papillae of tongue.

Front 4

Lips contain
3c

Back 4

stratified squamous keratinizing epithelium

Transitional or Red Area

Hair follicles, sebaceous and sweat glands are not present in this zone. The red margin has numerous sensory nerve endings in dermis and is extremely sensitive to touch.

Front 5

Cheeks called =

HAs what epithelial Tissue

Back 5

buccinator

subcutaneous connective tissue
subcutaneous connective tissue
lined
mucous membrane.

Front 6

tongue muscle =

Back 6

striated skeletal muscle
and
glands.

Front 7

*** 4 types of papillae are present on the tongue:

Back 7

filiform
fungiform
circumvallate
foliate

Front 8

Taste buds
Clinical correlation: Type I familial dysautonomi

Back 8

Riley-Day syndrome
causes severe hypogeusia (decreased ability to detect taste).

Front 9

Taste receptor cells have a lifespan of

Back 9

10 to 14 days

Front 10

Types of taste buds -
5ct

Back 10

Sweet
sour
bitter
salty
fifth taste is umami
the taste of monosodium glutamate

Front 11

The _________ nerve carries the five taste sensations;

Back 11

facial nerve

Front 12

lacks papillae

Back 12

posterior third of the upper surface of tongue

Front 13

Glands of the Tongue:

Back 13

mucous glands
serous glands
mixed acini

Front 14

Hard Palate:
is covered by

Back 14

stratified squamous
keratinizing epithelium

Front 15

Soft Palate covered by

Back 15

covered inferiorly by stratified squamous nonkeratinizing epithelium.

nasal side the soft palate is covered by the pseudostratified columnar ciliated epithelium

Front 16

Pharynx
pharynx is lined by

Back 16

nonkeratinizing stratified squamous epithelium

Front 17

In adult human, has __ teeth =

Back 17

32 permanent teeth

list them
4 set types

Hint 17

2 incisors,
1 canine,
2 premolars
3 molars.

Front 18

The permanent teeth are preceded by
____
(baby) teeth.

Back 18

20 deciduous

There are no deciduous precursors of

Hint 18

12 permanent molar teeth.

Front 19

The organic matrix of dentin is secreted by

Back 19

odontoblasts

Front 20

The odontoblasts produce organic matrix only at the dentinal surface. The cytoplasm of each of these cells contains a nucleus at its base, a large Golgi complex, many ribosomes and secretory granules containing procollagen.

info

Back 20

.

Front 21

Each prism is formed by a single =

Back 21

ameloblast

Front 22

The susceptibility of enamel crystals to dissolution in acidic pH is the basis for

Back 22

dental caries

Front 23

meloblasts are tall _________ cells

Back 23

columnar

Front 24

Like dentin, enamel is laid down rhythmically, and cross sections of the tooth crown show

Back 24

concentric,
parallel,
incremental lines of
Retzius.

Front 25

Cementum, like bone, is a _________
tissue that reacts to stresses and under certain circumstances can undergo resorption or hyperplasia.

Back 25

labile tissue

Front 26

fibers from the periodontal membrane which penetrate the cementum as _______ fibers. These do not calcify.

Back 26

Sharpey’s

Front 27

The pulp of the tooth is _______________ in origin

Back 27

mesenchymal

Front 28

Pulp
The main cell type is __________ and resemble mesenchyme

Back 28

stellate

Front 29

Beneath the layer of odontoblasts is a relatively cell—free area, the zone of __________

Back 29

Weil.

Front 30

All pulpal vessels are _______ walled and are thus pressure sensitive, lying as they do in an unexpandable chamber. Thus relatively mild inflammation and edema can cause occlusion of the blood vessels and consequent death of the pulp.

Back 30

thin

Front 31

periodontal membrane or ligament is a special type of dense fibrous connective connective

the suspensory ligament of the tooth in its socket.

Back 31

Periodontal ligament

Front 32

Periodontal ligament

Back 32

Strong, thick bundles of collagenous fibers

extending into the bone and cementum as ____ fibers.

Hint 32

Sharpey’s

Front 33

gingiva or gum
Keratinized or
Non-Keritanized

Back 33

keratinizing
stratified squamous epithelium

Front 34

linked to
tooth enamel by
cuticle
epithelial attachment of ________
recedes with advancing age

Back 34

Gottlieb,

Front 35

furrow surrounding crown, the ________ ________ which is lined by ____________ stratified squamous epithelium.

Back 35

gingival crevice,

nonkeratinizing