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Block 5 Path Exam 2
Dr. Hill
22
Histology
Graduate
09/06/2012

Additional Histology Flashcards

 


 

Cards

Term
pancreas
Definition
large organ located retroperitoneally behind the stomcah. has both major endocrine and exocrine function
Term
stroma
Definition
subcapsular loose connective tissue with incomplete septa. incomplete separation of lobules
Term
parenchyma
Definition
compound tubuloacinar gland with acini composed entirely of serous cells. cytoplasm very basophilic, extrememly high rate of protein synthesis, secrete bulk of digestive enzymes.
Term
duct cells
Definition
pale staining. secrete sodium bicarb solution
Term
islets of langerhans
Definition
endocrine portion of pancreas. 1 gram. arranged as clumps of anastamsing cords of polygonal cells with a rich investment of fenestrated capillaries. autonomic fibers.
Term
alpha cells
Definition
release glucagon
Term
beta cells
Definition
release insulin
Term
delta cells
Definition
release small amounts of somatostatin
Term
liver
Definition
major metabolic organ. carb, lipid, protein metabolism. drug detox. form blood albumins and clotting factors. vitamin and mineral storage. remove senescent RBCs. bile production
Term
hepatocytes
Definition
polyhedral cells with spherical, centrally located nuclei. arranged in cords. eosinophilic cytoplasm due to SER. basophilic bodies due to RER. glycogen granules visible with PAS staining. one surface in contact with sinusoid and another in contact with bile canaliculus
Term
central vein
Definition
collects blood that perfuses sinusoids
Term
sinusoids
Definition
arranged radially around central vein. run between cords of hepatocytes.
Term
endothelial cells
Definition
discontinuous lining sinusoids
Term
Kuppfer cells
Definition
macrophages. phagocytize particulate matter and RBCs.
Term
stellate cells
Definition
store vitamin A and production of extracellular matrix and collagen. not distinguishable with light microscopy.
Term
portal triads
Definition
hepatic arteriole, portal venule, bile ductule. in corners of lobule.
Term
portal vein
Definition
carries nutrient rich blood from small intestine
Term
bile canaliculi
Definition
formed via collaborated grooves in surfaces of adjascent hepatocytes. edges sealed by tight junctions. drain into bile ductule
Term
gall bladder
Definition
elongated tapering organ suspended from the inferior surface of the liver. stores bile.
Term
gallbladder mucosa
Definition
lined with simple columnar epithelium. contains microvilli but not packed densely enough to always show a striated border. actively pump sodium into intracellular space, which osmotically draws in water from lumen thereby concentrating bile. not the typical layering of GI
Term
Rokitansky-Aschoff sinuses
Definition
false appearance of glands produced by the highly folded nature of the gallbladder
Term
gallbladder muscularis externa
Definition
thin sheets of smooth muscle oriented in an oblique spiral patter to propel bile out
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