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53 Cards in this Set

  • Front
  • Back
What is the function of the salivary glands?
to produce saliva to wet and lubricate oral mucosa and ingested food
initiate digestion of carbs by amylase & lipids by lipase
secrete germicidal IgA, lysozyme and lactoferrin
What are the three main salivary glands of the digestive tract?
parotid glands (2)
submandibular (2)
sublingual (2)
What are the main types of cells found in the salivary glands?
What is the function of the mucous cell?
produce mucins
What is histological description of the mucous cell?
cuboidal to columnar in shape with an oval nucleu pressed near the base
How are mucous cells organized in the salivary glands?
tubular cylinders around a lumen
What is a serous demilune?
the arrangement of serous cells that cap the mucous cells in the tubules of the submandibular and sublingual glands
What is the purpose of the myoepithelial cell?
contraction accelerates secreation of saliva & prevention of end piece distortion during secretion
Describe path in ductal system
secretory portions -> intercalated ducts -> striated ducts -> interlobular (excretory ducts)
What surround the secretory and ductal components of each lobule of secreting gland?
rich vascular and nerve plexuses
What surrounds the 3 main salivary glands?
a capsule
What type of gland is in the parotid gland?
branched acinar gland
What type of gland is in the submandibular gland?
branched tubuloacinar gland
What is the main type of cells are found in the parotid gland?
serous cells with granules rich in porteins and amylase
What type of ducts are present in the parotid gland?
intercalated and striated
What type of cells are found in the submandibular gland?
serous (90%) and mucous cells )10% w/serous demilunes)
What is the function of the serous demilunes in the submandibular gland?
to secrete lysozyme
What is the function of the acinar serous and intercalated duct cells in the submandibular gland?
to secreat lactoferrin
What type of ducts are found in the submandibular gland?
striated and intercalated
What type of gland is the sublingual gland?
branch tubuloacinar gland
What type of cells are found in the sublingual gland?
mucous cells
(some serous demilunes)
What do the serous cells in the sublingual gland secrete?
What is different about the microsalivary glands?
produce saliva (mostly mucous)
What is produced by von Ebner's glands?
serous product
Where is the pancreas located?
close to stomach
what are the gross regions of the pancreas?
head, body and tail
What covers pancreas and what does it form?
thin capsule and form septa that separate parenchyma into pancreatic lobules
What is function of pancreas?
mixed endocrine and exocrine gland
Where are the endocrine secretions formed in the pancreas and what are they?
In the islets of Langerhans
insulin and glucagon
Where are the exocrine secretions of the pancreas?
alkaline fluid composed of water, ions and several proteases
What type of gland is in the exocrine portion of the pancreas?
compound acinar gland
Where does the main pancreatic duct open into?
the duodenum
How are exocrine secretions of the pancreas controlled?
secretin and cholecystokinin
parasympathetic stimulation of vagus nerve
What is the largest gland?
What covers the liver?
Where does the blood enter the liver?
Most through the hepatic portal vein, some through hepatic artery proper
What is the hilum of the liver?
the location of the entrace of the hepatic proper artery and hepatic portal vein, and exit of the ducts
What is the functional unit of the liver?
the liver lobule
What type of cells are found in the liver loboule
How are hepatocytes arranged?
interconnected plates and separated by liver sinusoids
What is the space of Disse?
The space that separates the endothelial cells of the sinusoids from the hepatocytes
What are Kupffer cells?
metabolize aged RBC and digest hemoglobin, destroy bacteria secrete proteins for immune system
Where are Kupffer cells found?
within the sinusoids, may be near portal areas
Where is the central vein located?
in the center of each liver lobule
What is found in the portal of the liver?
A venule, arteriole and duct
histological description of hepatocyte?
polyhedral cell with 6 or more surfaces and 1-2 rounded nuclei
What is a function of hepatocytes ?
produce bile
emulsify lipids
How is bilirubin derived?
most from breakdown of heloglobin from old RBCs in the spleen & liver
Where is the bile canaliculi found?
small tubular space between adjacent hepatocytes
What is the biliary tract
Bile ducts from the portal spaces enlarge -> right & left hepatic ducts -> common hepatic duct -> cystic duct
Where is the gallbladder found?
beneath the liver
what are the layers of the gallbladder?
mucosa, smooth muscle and perimuscular layer of connective tissue and a serosa
What is function of gall bladder
store bile, concentrate it and release it