Salivary Glands Flashcards
Name the Associated glands (extra mural) of the digestive system
Salivary glands
Pancreas
Liver
Gallbladder
Function of salivary glands
Produce saliva: digestive, lubricating & protective functions
3 major pairs of salivary glands
Parotid
Submandibular
Sublingual
What surrounds each salivary gland?
CT capsule
What creates the structure of lobes?
CT capsule extends septa of CT that divide parenchyma into lobes
Define parenchyma
Secretory units (glands) arranged as many acini
Define acinus (pl. acini)
Blind sac composed of secretory cells
3 types of acini
Serous
Mucous
Mixed
Serous acini - cells
Only serous cells
Serous acini secrete ____
proteins
Serous acini shape
Cells pyramidal in shape, round basal nucleus, apical secretory granules
Mucous acini - cells
Only mucous cells
Mucous acini - shape
Cells pyramidal - somewhat columnar appearance, compressed basal nucleus, apical granules
Mucous acini granules contain _____ which have _____ properties
Mucins
Lubricating properties
Mixed acini - cells
Both serous & mucous cells
Mucous acini have a cap of serous cells called ____
Serous demilunes
Define duct system
3 sequential, enlarging segments
Types of ducts
Intercalated
Striated (intralobular)
Excretory
Intercalated duct leads from the ____
Acinus
Intercalated duct lined by ____
Low cuboidal epithelium
Striated (intralobular) ducts are lined by ____
Simple columnar epithelium
What gives striated ducts their striated appearance?
Numerous infoldings of basal plasma membrane lined by mitochondria
Purpose of mitochondria in striated ducts
Modify electrolyte components of saliva
What are excretory ducts?
Large ducts that empty into oral cavity
What are myoepithelial cells?
Small, flattened, contractile cells that lie beneath basal plasma membrane of epithelial cells of acini and basal lamina (basement membrane)
Parotid gland location
Below and in front of ear
Parotid gland only contains ____
Serous acini
Parotid glands produce ____
Abundant Amylase
Amylase function
Initiates hydrolysis of carbohydrates and proline-rich proteins with antimicrobial & other protective properties
Submandibular gland location
Under either side of floor of mouth close to mandible
Submandibular glands are ____ glands
Mixed glands - serous acini mixed with mucous serous caps
Serous demilunes
Mucous acini with Serous caps
(Mixed with serous acini in submandibular glands)
Submandibular glands produce ____
Lysozyme
Lysozyme
Hydrolysis of bacterial walls (also amylase & proline rich proteins)
Sublingual glands location
Floor of mouth anterior to submandibular glands
Sublingual glands are ____ glands, containing mostly _____
Mixed glands, mostly mucous acini
Main product of sublingual glands is ____
Mucus
