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Histology Winter Semester > GIT I (Lecture 14) > Flashcards

GIT I (Lecture 14) Flashcards

1
Q

Describe the structure of the lip

A
  • Skin part, red region, mucosal part
  • Skeletal muscle - orbicularis oris muscle
  • Skin – thin epidermis hair follicles sebaceous glands
  • Mucosa - stratified squamous epithelium non-keratinizing
  • Connective tissue - rich in capillaries, mixed tubuloalveolar salivary glands
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2
Q

What is this slide?

A

The lip

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3
Q

Describe the tongue

A

Muscular organ covered by modified mucosa.

Muscle fibres cross one another in three planes.

Attached into connective tissue - lingual aponeurosis and lingual septum.

Ventral surface of the tongue - smooth surface, stratifued squamouns epithelium.

Dorsal surface - mucosa is attached to lingual aponeurosis - no submucosa.

Filiform papillae, fungiform papillae, circumvallate papillae.

Tonsila lingualis - lymphoid follicles, epithelium, crypts, tubular mucinous Weber’s glands.

Glands of the tongue - von Ebner’s serous glands, tubular mucinous Weber’s glands, tubuloalveolar gland apicis linguae.

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4
Q

What is this slide?

A

Tongue

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5
Q

What is this slide?

A

Tongue

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6
Q

What is this slide?

A

Tongue

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7
Q

What is this slide?

A

Tongue

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8
Q

What is this slide?

A

Tongue

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9
Q

What is this slide?

A

Tongue

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10
Q

What is this slide?

A

Tongue

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11
Q

What is this slide?

A

Tongue

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12
Q

Explain the features of teeth

A

Crown, cervix, root(s)

Enamel, dentin, cementum, dental pulp

Bony socket - alveolus

Enamel

  • 98% mineral salts, crystals of hydroxyapatite, enamel rods.

Dentin

  • A calcified connective tissue.
  • 72% of mineral component.
  • Organic component – collagen fibrils, glycosaminoglycans.
  • Is formed by odontoblasts in the pulp cavity, the odontoblast processes (Tomes’s fibers) running in the dentinal tubules.
  • Predentin unmineralized dentin.

Cementum

  • Has a structure similar to bone.
  • Covers dentin.
  • Cementocytes and cementoblasts.

Pulp

  • Loose connective tissue (mucous)
  • Collagen fibrils, ground substance
  • Fibroblasts
  • Blood supply - capillaries
  • Lymphatic capillaries
  • Nerve fibers
  • Enter through the apical foramen

Periodontium

  • Periodontal ligament - connective tissue binding the tooth to its bony socket
  • Penetrate into the cementum
  • Gingiva
  • Junctional epithelium bound to the enamel
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13
Q

What is this slide?

A

Tooth

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14
Q

What is this slide?

A

Tooth

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15
Q

What is this slide?

A

Tooth

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16
Q

What is this slide?

A

Tooth

17
Q

What is this slide?

A

Tooth

18
Q

What are the exocrine glands of the digestive system?

A

Major salivary glands, pancreas and liver (with associated gall bladder)

19
Q

What are the major exocrine salivary glands of the digestive system?

What are thier function, structure and ducts?

A

Consists of three paired exocrine glands :

  • parotid
  • submandibular
  • sublingual

Function:

  • Secrete salivary amylase, lysosyme, lactoferrin and a secretory component, which complexes with IgA (produced by plasma cells in the connective tissue), forming a complex that is resistant to enzymatic digestion in the saliva

Structure:

  • Glands are classified as composed tuboalveolar, serous or mixed

Ducts

  • Intralobular - simple cell lining - intercallated and striated ducts interlobular - double layered epithelial lining
    duct. parotideus -stratified squamous epithelium
20
Q

What is the structure of the submandibular gland

A
21
Q

What are the components of the parotid salivary gland?

A
  • Compound, serous gland
  • Alveoli (acini)
  • Myoepithelium
  • Intercalated ducts - simple cuboidal epithelium
  • Striated ducts - columnar epithelium, basal striations
  • Interlobular ducts – columnar, pseudostratified, stratified Cuboidal ductus parotideus - stratified columnar
22
Q

What is this slide?

A

Parotid gland

23
Q

What is this slide?

A

Intercalated duct

24
Q

What is this slide?

A

Striated duct

25
Q

Describe the features of the submandicular gland

A
  • Compound, mixed
  • Serous acini
  • Mucinous tubules with serous demilunes
26
Q

What is this slide?

A
27
Q

What is this slide?

A
28
Q

Describe the features of the sublingual gland

A
  • Comound, mixed
  • Mucinous tubules with serous demilunes
  • No intercalated ducts
29
Q

What is this slide

A

Sublingual gland

AZAN staining

D = interlobular duct

M = mucous tubule

Arrow = serous acinus

30
Q

What is this slide?

A

Sublingual gland

HE staining

M = mucous tubule

31
Q

What is this slide?

A

Sublingual gland

32
Q

Describe the features of the pancreas

A

Mixed endocrine and exocrine gland

Exocrine part has acinar arrangement, consist of:

  • Serous cells - highly polarized, typical protein producing cells
  • Centroacinar cells - continuation of intercalated ducts

Capsule
Septum
Pancreatic lobules, BM, reticular fibers
Ducts:

  • Intralobular intercalated
  • Striated have not been differentiated
  • Interlobular

Main pancreatic ducts

Secretion = pancreatic juice – digestive enzymes

33
Q

What is this a scheme of?

A

Pancreas

34
Q

What is this slide of?

A

Pancreas

HE staining

Histology Winter Semester (10 decks)

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