11. Digestive System 2 Flashcards
Describe nucleus of hepatocyte
Large, central, may be binucleated
this is where the pancreas empties its exocrine product.
duodenum
Main product of submaxillary glands?
Lysozyme
Epithelium lining canals of Hering?
Cuboidal
Biliary passages start with tiny __________ between hepatocytes
bile canaliculi
This vessel supplies blood to the liver that is rich with the products of digestion.
portal vein
Purpose of the infoldings in striated ducts that give them the appearance of striations?
Increases surface area
This vascular component of the liver is lined by cuboidal epithelium.
bile ductule
These ducts are the major ducts in the exocrine pancreas.
striated ducts
Where are striated ducts found?
ONLY in salivary glands (not in pancreas)
Type of duct surrounded by connective tissue
Interlobular duct
Pale-staining cells within a pancreatic acinus
Centroacinar cells
Portal triads are supported by this material
Connective tissue
Vascular channels in between hepatocytes
Sinusoids
3 unique surfaces of hepatocytes?
- Sinusoidal
- Canalicular
- Intercellular
How are hepatocytes arranged in an adult liver?
In long plates
As canaliculi approach the periphery of each liver lobule, they are drained by small ducts known as ___________
canals of Hering
This is the name of the capsule of the liver
Glisson
This salivary gland is entirely serous and secretes enzymes like amylase and lysozyme
Parotid gland
This structural unit of the liver has three zones which define cells with different degrees of oxygenation.
acinus
Epithelium of gall bladder?
Simple columnar with short microvilli
Where is the Islet of Langerhans found?
ENDOCRINE pancreas
Shape of hepatocytes?
Polygonal
Secretory granules of serous cells are called?
Zymogen granules
These cells form part of the liver endothelial lining
Kupffer cells
This separates the the sinusoid from the hepatocytes.
Space of disse
3 secretions from exocrine pancreas
- Bicarbonate
- Trypsin
- Chymotrypsin
The endothelium is separated from hepatocyte by ___________
space of disse
What are the 2 nodules in the liver
- Lobule
- Acinus
This is the name of a circular collection of exocrine cells in the pancreas.
acinus
The cytoplasm of mucous cells is filled with ___________ which dissolve with normal processing
mucigen granules
The liver sinusoidal endothelium is separated from hepatocytes by __________
Space of Disse
Liver acinus zone 1 is between these things
Portal triads
The presence of a striated duct indicates what organ?
Salivary gland
These are larger bile ducts.
Canals of Hering
A cluster of secretory cells is referred to as a(n) __________
acinus
Type of surface that makes up most of hepatocyte surfaces
Sinusoidal (~70%)
4th possible component of portal triad (usually not seen)
Lymphatic
Liver acinus zone 3 is closest to these things
Central veins
What makes up a liver lobule?
6 portal triads around a central vein
What is a demilune?
Crescent-shaped cluster of SEROUS cells on the outside of a mucous acinus
The liver’s outer layer of mesothelial cells
visceral peritoneum
Parenchyma of liver is supported by?
Reticulin fibers
This salivary gland is mainly mucous
Sublingual glands
This connective tissue fiber supports the sinusoids
Reticulin
These are the smallest bile ducts
bile canaliculi
These cells represent the first part of the ductal system in the exocrine pancreas.
centroacinar
These cells are the exocrine cells of the pancreas.
acinar cells
These macrophages are found in the liver.
Kupffer cells
