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HSF Block 4 > Histo - Oral Cavity > Flashcards

Histo - Oral Cavity Flashcards

1
Q

What are the 4 Main Functions of the Oral Cavity?

A
  1. Phonation
  2. Ingestion, mastication
  3. Digestion of carbs & lipids starts
  4. Immune function
    • saliva contains IgA from PLASMA CELLS
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2
Q

What is this?

A

Lips

3 Different Surfaces:

  1. Exterior (cutaneous; thin skin)
    • SSK
    • Hair, sweat glands, sebaceous glands
  2. Vermillion border (Red region)
    • thin skin w/ capillary tufts
    • no hair, no glands
  3. Interior (oral mucosa)
    • SSNK
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3
Q

What are the type of papillae on tongue?

A
  1. Filiform
    1. pointed
    2. NO TASTE BUDs
    3. scattered over dorsal surface
    4. cause roughness
  2. Fungiform
    1. TASTE BUDS
    2. mushroom shaped
    3. dorsal & lateral surface
    4. red-dots on tongue surface
  3. Circumvallate (Vallate)
    1. LATERAL TASTE BUDS
    2. anterior to sulcus terminalis
    3. deep moats
      1. Von Ebner’s glands (serous salivary glands) open into base of moats
  4. Foliate
    1. LATERAL TASTE BUDS
    2. peglike, but similar to vallate
    3. best dev in children
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4
Q

What is this?

A

Papillae

  1. Filiform - NO TASTE BUDS (pointed)
  2. Fungiform
  3. Circumvallate (Vallate)
  4. Foliate
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5
Q

What is this?

A

Foliate Papillae

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6
Q

What is this? What is associated with this?

A

Serous salivary glands are associated
with foliate papilla

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7
Q

What is this?

A

Tongue

  • Skeletal Muscle
    • intrinsic = change shape
    • extrinsic = movement
  • Multiple orientations of tongue
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8
Q

What is this?

A

Taste Buds

  • Barrel shaped
  • Openings = TASTE PORE
    • ​connect to CNS
  • Cells
    • taste receptors = GUSTATORY CELLS
      • microvilli that go towards takes pore
    • supporting cells
    • immature cells
    • stem cells/basal cells
  • Tastes dissolve into saliva & contact the microvilli to interact w/ taste receptors
    1. ​sweet
    2. sour (acid)
    3. bitter (alkaloids)
    4. salty
    5. umami (AAs)
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9
Q

How many teeth do we have as children vs. adults?

A

20 - children / 32 - adults

Components to teeth:

  • Crown
    • covered by enamel
  • Neck
    • enamel + cementum come together
  • Root
    • covered w/ cementum
  • Dentin + Pulp cavity
    • sockets in jaw
    • Pulp = CT in center of tooth + Blood vessels + nerves
      • enter via APICAL foramen
  • Peridonatal ligaments
    • hold tooth –> jaw (SHARPEY’S FIBERS)
      • type I collagen

NOTE:

  • Scurvy = loss of peridontal ligamnets
    • loss of collagen due to lack of VIT C
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10
Q

What are the 3 types of cells in the tooth?

A
  1. Ameloblasts (lose this as ADULT)
    • from ECTODERM
    • make ENAMEL (90% of tooth)
    • CANNOT BE REPLACED
  2. Cementoblasts
    • from CRANIAL NEURAL CREST (ectomesenchyme)
    • make CEMENTUM (45%)
  3. Odontoblasts
    • from CRANIAL NEURAL CREST (ectomesenchyme)
    • make DENTIN (60-70%)
    • DONT DIVIDE
    • nerve fibers run in dentin tubules
      • cause pain sensation
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11
Q

What is this?

A

Root Canal & Implant

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12
Q

What is this?

A

Developing Head & Teeth!!

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13
Q

What is happening in this pic?

A

Developing Tooth

Cell Fates:

  1. Inner enamel (dental ) epithelium
    • becomes AMELOBLASTS
    • die when tooth erupts
  2. Outer enamel (dental) epithelium
    • lost when tooth erupts
  3. Cells in primitive dental papilla adjacent to inner enamel
    • become ODONTOBLASTS
  4. Stellate reticulum
    • Lost when tooth erupts
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14
Q

What is this?

A

Tooth:

Dental Lamina from Oral Ectoderm & Bud of the Permanent
Tooth

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15
Q

What are the layers in this image?

A
  1. Ameloblasts
  2. Enamel
    • basophilic
  3. Odontoblasts
  4. Dentin
    • eosinophilic
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16
Q

What is this?

A

Ameloblasts

17
Q

What is this?

A

Odontoblasts and Dentinal Tubules

18
Q

What is this?

A

Periodontium
Holds teeth to jaw bones and gingiva

19
Q

What is this?

A

Sharpey’s Fibers

20
Q

What is this?

A

Parotid Salivary Gland

  • Serous acini
    • ALL dark/basophilic gland things
21
Q

What is this?

A

Submandibular Salivary Gland

  • Mixed type!
    • Mucous (eosinophilic)
    • Serous acini (basophilic)
22
Q

What is this?

A

Sublingual Salivary Gland

  • ​ALL Mucous cells
    • some serous demilunes
      • ​due to swelling of mucous cells
23
Q

What is left vs. right image?

A
24
Q

What is this?

A

Parotid Gland

  • All serous acini
    • secretes = AMYLASE granules
25
Q

What is this?

A

Serous and Mucous Cells

  • Mixed acinar cells
    • most likely = SUBMANDIBULAR
26
Q

What are the 3 types of cells in Salivary Gland Ducts?

A
  1. Intercalated (within lobule)
    • secrete bicarnate + IgA + lysosomes
  2. Striated (within lobule)
    • apical round nucei
    • basal striations
    • reabsorption of Na / Cl-
    • excretion of K+
  3. Excretory (outside lobule)
    • ​transport saliva

NO CENTRAL ACINAR CELL

HSF Block 4 (10 decks)

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