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Histology > Salivary glands, pancreas and liver > Flashcards

Salivary glands, pancreas and liver Flashcards

1
Q

What are the contents of the portal tract?

A
  • Branches of portal vein
  • Branches of heptic artery
  • Branches of bile duct
  • Lympatics
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2
Q

What is the hepatic triad?

A
  • Portal vein
  • Hepatic artery
  • Bile duct
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3
Q

What are bile canaliculi?

A

Small channels formed by opposing membranes of the hepatocytes into which bile is secreted. These then drain into the bile ducts.

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4
Q

What are the functions of Kupffer cells?

A
  • Removal of damaged red blood cells.
  • Removal of bacteria.
  • Removal of cellular debris in blood.
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5
Q

What are the sturctural features of the hepatic sinusoidal capillaries?

A
  • Wide, irregular lumen
  • Fenestrations
  • Space of Disse (IF between hepatocytes and sinusoidal fenestrations)
  • Basement membrane poorly developed and may be absent
  • Kupffer cells line the sinusoids
  • Microvilli protrude from hepatocytes into spaces of DIsse.
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6
Q

What are the major salivary glands in the body?

A
  • Parotid gland
  • Submandibular gland
  • Subingual gland
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7
Q

What is the structure of salivary gland?

A

They are divided into lobules by inward extensions of the capsule called septa.

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8
Q

What are the types of secretory cells found in secretory acini?

A
  • Mucous cells
  • Serous cells
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9
Q

What are the differences between mucous cells and serous cells?

A
  • Mucous cells have flat, basally located nuclei while serous cells have round, centrally located nuclei.
  • Mucous cells have poorly stained nuclei while serous cells have strongly stained nuclei.
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10
Q

What are the structures formed by serous cells around mucous cells in mixed acini?

A

Demilunes

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11
Q

What are the different components of the pancreas?

A
  • Exocrine: Secretory acini
  • Endocrine: Islets of Langerhans
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12
Q

What is the structure of the pancreas?

A
  • The pancreas is divided into lobules by inward extension of capsule.
  • Excretory ducts and blood vessels are found in areas of support tissue.
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13
Q

What are interculated ducts?

A

Smallest branches of the duct system.

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14
Q

What types of epithelia line the interculated ducts>

A
  • Squamous epithelium
  • Low cuboidal epithelium
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15
Q

What is the structure of the pancreatic duct system?

A

Interculated ducts → Intralobular ducts → Interlobular ducts

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16
Q

What is the arrangement of cells in islets of Langerhans?

A
  • α-cells are on the periphery of the islets.
  • β-cells are in the centre of the islets.
17
Q

Where does blood from the islets of Langerhans drain?

A

Hepatic portal vein

Histology (9 decks)

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