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43 terms

salivary glands

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endocrine gland
products carried away in blood stream
exocrine gland
products carried away by ducts leading from gland (i.e. salivary glands)
holocrine gland
entire cell dies releasing secretion
merocrine gland
secretions pass through cell wall and the cells stay intact (i.e. salivary glands
epithelium
salivary glands develop from ____________ and grows downward into connective tissue.
acini
bulb-like processes
tubules
tube-like processes
serous cells
secrete serous saliva which is a thin, watery fluid which contains serum-albumin
serum-albumin
a protein found in many animal and vegetable tissues
mucous cells
secrete mucous saliva which is a ropy fluid which contains mucin
mucin
this is the main component of mucous and contains mucopolysaccharides/CHO)
mixed cells
contains both serous and mucous components (usually with more serous).
exocrine, merocrine, compound tubuloalveloar, and serous/mucous/mixed
how are salivary glands classified?
pyramidal cells
these are actually the serous and mucous cells which form a circular pattern and look pyramidal in shape
base of pyramidal cells
part of the pyramidal cells which is the outer edge and rests on CT
apex of pyramidal cells
part of the pyramidal cells which faces the center of tube or duct
myoepithelial cells
a star shaped branched cells that encircle terminal portions and "squeeze" the secretion into the duct by contracting
they are single epithelial cells capable of contracting ( what = muscle?)
they have long cellular projections which make them look like a squid
demilunes
these are half moon shaped cells that lie between the secretory cells and the basement membrane which enclose the alveoli.
they are believed to be new epithelial cells which will replace epithelial cells that disintegrate
intralobular ducts
within the lobes; can be:
1) intercalated ducts
2) straited (secretory ducts)
intercalated ducts
are a type of intralobular duct that are very small.
they drain acini directly and carry secretions to straited ducts
straited ducts
are a type of intralobular duct where as saliva is passed through it, it is "modified"
water and ions are absorbed into the cells and secreted out basal end and picked up by bloodstream
it's purpose is to conserve water and electrolytes .
interlobular ducts
these are excretory ducts that do not modify saliva
they lie within CT between lobules of the gland
they are lard and carry secretions out of gland and to the surface of the oral cavity.
saliva
this is a complex fluid which bathes part of the tooth exposed within the oral cavity.
1 liters
how much saliva is produced in one day?
99
saliva is ___% water
acidic
saliva's PH is slightly __________.
functions of saliva?
acts as a SOLVENT
makes TASTE possible
aids in DIGESTION
LUBRICATION
CLEANSING action
ANTIMICROBIAL
Major Salivary Ducts
there are 3 pairs of these connected to the mouth by ducts
they produce most of the saliva in the mouth
parotid gland
this is the largest major salivary gland
on the side of the face, immediately below and in front of ear
secretes purely serous
25% of resting saliva through Stenson's Duct
parotid
the _________ gland is involved in epidemic parotitis (mumps). it is a viral infection that is painful when the gland secretes.
submandibular gland.
60-65% of resting saliva through Wharton's Duct
mixed gland, more serous than mucous
located below and toward posterior part of mandible
sublingual gland.
the smallest of the 3 major salivary glands
almond shaped
10% of resting volume
located in anterior floor of mouth next to mandibular canines
mixed gland; mostly mucous
ducts of rivinus
the small sublingual duct which opens into the mouth on the sublingual fold
Bartholin's duct
the larger of the sublingual ducts, which opens into the submandibular duct
Minor Salivary Ducts
these are more numerous and found throughout the oral cavity
they are unnamed and have shorter ductal systems
the function is to secrete small amounts of saliva and keep mucosa wet
labial glands
mixed gland
in upper and lower lips
opens onto inner surface
buccal glands
mixed gland
on inner cheek region
palatine glands
pure mucous gland
located in soft palate and posterior and lateral of hard palate
none in anterior portion of palate
glossopalatine glands
pure mucous gland
from posterior lateral hard palate into anterior fold of tissue in front of palatine tonsils
lingual glands
there are three of these, and they are anterior, von ebner, and posterior.
anterior lingual
mucous gland
near tip of tongue
opens onto ventral surface of tongue
lingual glands of von ebner
serous gland
located beneath vallate papillae
opens into trough around gland and washes off taste buds
posterior lingual
mucous gland
located around lingual tonsils on posterior third of tongue