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Gastrointestinal - Anatomy/Embryology/Histology > Histology of Upper GI > Flashcards

Histology of Upper GI Flashcards

0
Q

What is the supporting wall to the lip?

A

Orbicularis oris

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1
Q

What are the generic layers to the walls of the digestive tract?

A

Mucosa
Submucosa
Supporting wall
Adventitia or serosa

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2
Q

What is histologically different for the red area of the lip in comparison to the cutaneous and oral mucosa regions?

A

Deep dermal papillae

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3
Q

How is the oral mucosa histologically different from the red area or cutaneous area of lip?

A

Nonkeratinizing epithelium

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4
Q

What is the supporting wall to the cheek?

A

Buccinator muscle

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5
Q

What change in the cheek histology (from lip histology) helps to reduce chomping?

A

More elastic tissue in submucosa

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6
Q

What areas of the oral cavity are keratinized?

A

Top of tongue
Hard Palate
Red area and cutaneous area of lip

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7
Q

What is present in the submucosa of the posterior 2/3 of hard palate and on the soft palate?

A

Seromucous glands

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8
Q

What histologically separates the soft palate and hard palate?

A

Hard palate has bone support, soft palate has muscle support

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9
Q

What are four papillae of the mucosa on the dorsal tongue?

A

Circumvallate papillae
Fungiform papillae
Filiform papillae
Foliate papillae

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10
Q

What nerves supply the anterior 2/3 of the tongue with sensory info? Posterior 1/3?

A

Anterior: V and VII
Posterior: IX and X

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11
Q

Where are the circumvallate papillae on the tongue surface?

A

Posterior

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12
Q

What persistent feature of the tongue gives rise to the thyroid gland?

A

Foramen Cecum

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13
Q

What do the deep layers of the posterior 1/3 of the tongue contain?

A

Many lymphocytes, considered lingual tonsil

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14
Q

Which papillae have the most direct taste bud association?

A

Fungiform papillae

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15
Q

Which papillae are most like the cat tongue?

A

Filiform papillae

16
Q

Which papillae are the most numerous?

A

Filiform

17
Q

What do fungiform papillae look like?

A

Club shaped, reddish tint

18
Q

What is the role of Von Ebner’s glands?

A

Flush out debris from circumvellate papillae crypts

19
Q

What should we know about foliate papillae?

A

Not well developed in humans
Associated with taste buds
On the side of the tongue

20
Q

What cells are a part of a taste bud?

A

Sustentacular cells
Taste receptor cells
Basal cells

21
Q

What makes dentin?

A

Odontoblasts

22
Q

What makes enamel?

A

Ameloblasts

23
Q

What is the role of the periodontal ligament?

A

collagenous fibers act as sling

24
Q

What composes enamel?

A

3% protein

97% mineral

25
Q

What is the composition of dentin?

A

30% protein

70% minerals

26
Q

What embryonic tissue makes teeth?

A

mesenchyme

27
Q 
From oustide to in, order the following:
Amelioblasts
Enamel
Dentin
Odontoblasts
A

Amelioblasts
Enamel
Dentin
Odontoblasts

28
Q

What are the major salivary glands?

A

Parotid
Submandibular
Sublingual

29
Q

What is the morphology of salivary glands?

A

Connective tissue capsule

Many lobes and lobules

30
Q

What is the normal histology for salivary ducts?

A

Secretory unit
Intercalated duct
Striated/interlobular/secretory duct
Excretory portion/interlobar duct

31
Q

Which is the smallest portion of a salivary duct?

A

Intercalated duct

32
Q

What are myoepithelial cells?

A

Specialized smooth muscle cells, assist discharge of secretory cells

33
Q

Where are myoepithelial cells?

A

Secretory unit and beginning of intercalated duct

34
Q

What does the submandibular gland look like on a slide?

A

Not that much of a connective tissue capsule
Scarce Intercalated ducts
Mostly serous acini

35
Q

What is distinguishable about the sublingual duct?

A

Striated ducts nonprevelant
Intercalated ducts nonexistent
Acini mostly mucosal

36
Q

What trends do you see in esophageal histology as you move from top to bottom?

A

Top 1/3: Mucous glands in mucosal layer, skeletal muscle around outside
Middle 1/3: Mucous glands in submucosa, Mix of skeletal and smooth muscle around outside
Bottom 1/3: Mucous glands in mucosal layer, Smooth muscle around outside

Gastrointestinal - Anatomy/Embryology/Histology (6 decks)

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