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Digestive System
MSU 2012
42
Histology
Undergraduate 4
11/15/2012

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Cards

Term
List the 3 major salivary glands
Definition
1. Parotid glands
2. Sublingual Glands
3. Submandibular glands
Term
What are compound tubulo-acinar glands? Give an Example
Definition
Glands w/ which have a duct system that branches EX: salivary glands
Term
What do both minor and major salivary glands secrete?
Definition
Saliva
Term
What does this secretion do?
Definition
Facilitates the process of tasting food
Term
How much is produced per day?
Definition
700 to 1,100 ml per day
Term
The vascular supply to the oral cavity is what?
Definition
Extraordinarily rich vascular supply
Term
How much greater is the blood flow to the oral cavity than to skeletal muscle?
Definition
20 times greater
Term
What four elements does salvia contain?
Definition
1.Salivary Amylase (ptyalin)
2.Lactoferrin (both #2 and #3 are antibacterial)
3.lysozymes
4.IgA (secretory immunglobulin)
Term
What does saliva begin?
Definition
Chemical digestion
Term
What is another one of its functions?
Definition
Lubricates the oral cavity
Term
What part of the oral cavity consists of serous cells, mucous cells, secretory uni, and myoepithelial cells (Basket cells)?
Definition
Acini
Term
Describe the shape of serous cells
Definition
Pyramidal
Term
What is their nucleus like?
Definition
Round nucleus, basally located
Term
What is(are) their product(s)?
Definition
Seromucous product: secrete both protein (salivary amylase) and polysaccharides
Term
What cells are similar in shape to serous but their nuclei are basal but flattened?
Definition
Mucous cells
Term
Describe its secretion.
Definition
Secretion: higher carbohydrate content
Term
What do myoepithelial cells (basket cells) do?
Definition
These cells have processes wrapped around the acini and striated ducts. These processes contract and press on the secretory unit to facilitate release of product into the duct
Term
What are 4 of the types of ducts found in the Acini? Describe each a little.
Definition
1.Intercalated Ducts= simple cuboidal cells
2.Striated Ducts= simple cuboidal to low columnar
3.Inter-lobar ducts = stratified cuboidal to stratified columnar
4.Terminal (principle) duct= stratified cuboidal to stratified columnar ****(same for 3 and 4)
Term
What is true about the size of intercalated ducts?
Definition
They are small and therefore less conspicuous
They are lined with simple cuboidal epithelium
Term
How are striated ducts formed?
Definition
Several intercalated ducts fuse to form a section of striated ducts
Term
Which ducts are surrounded by connective tissue?
Definition
Excretory or interlobular ducts are surrounded by connective tissue
Term
Which major salivary gland is the largest but only produces 30% of saliva?
Definition
Parotid Gland
Term
What are the secretory units primarily?
Definition
Serous (acini) secretory units (lack mucous acini)
Term
How are the units organized?
Definition
Units organized into lobules which are separated by loose connective tissue septa
Term
What tissue makes up these glands?
Definition
Lymphoid tissue
Term
What's the principle duct?
Definition
Principle duct: Stenson's
Term
What is the smallest major type of salivary gland?
Definition
Sublingual Gland
Term
How much saliva do they produce?
Definition
5% of saliva
Term
What type of acini (Secretory units) do they have?
Definition
Primarily mucous acini w/ serous demilunes
Term
Do they have lymphoid tissue?
Definition
No
Term
What is the principle duct?
Definition
Principle duct of Sublingual Glands= Bartholins duct or Rivinus ducts
Term
Where does its ducts open?
Definition
Ducts open into floor of mouth and ducts of submandibular gland
Term
What is another name for submaxillary gland?
Definition
Submandibular glands
Term
How much saliva does it produce?
Definition
60%
Term
What type and percentage of acini?
Definition
90%
Term
# of serous demilunes?
Definition
Restricted # of serous demilunes
Term
What kind of ducts? Describe.
Definition
Striated ducts that are longer than those of parotid or sublingual glands
Term
What forms the Septa of submandibular glands?
Definition
Connective tissue capsule is extensive forming abundant septa
Term
What type of infiltration is evident by mid-life?
Definition
Fatty infiltration evident by mid-life
Term
Lymphoid tissue?
Definition
No
Term
Principle duct?
Definition
Principle duct of Submandibular ducts= Wharton's duct
Term
Name the 3 regions or surfaces of the tongue
Definition
1. Dorsal surface
2. Ventral surface
3. Lateral surface
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