products carried away by ducts leading from gland (i.e. salivary glands)
entire cell dies releasing secretion
secretions pass through cell wall and the cells stay intact (i.e. salivary glands
salivary glands develop from ____________ and grows downward into connective tissue.
secrete serous saliva which is a thin, watery fluid which contains serum-albumin
a protein found in many animal and vegetable tissues
secrete mucous saliva which is a ropy fluid which contains mucin
this is the main component of mucous and contains mucopolysaccharides/CHO)
contains both serous and mucous components (usually with more serous).
exocrine, merocrine, compound tubuloalveloar, and serous/mucous/mixed
how are salivary glands classified?
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
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
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
within the lobes; can be: 1) intercalated ducts 2) straited (secretory ducts)
are a type of intralobular duct that are very small. they drain acini directly and carry secretions to 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 .
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.
this is a complex fluid which bathes part of the tooth exposed within the oral cavity.
how much saliva is produced in one day?
saliva is ___% water
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
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
the _________ gland is involved in epidemic parotitis (mumps). it is a viral infection that is painful when the gland secretes.
60-65% of resting saliva through Wharton's Duct mixed gland, more serous than mucous located below and toward posterior part of mandible
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
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
mixed gland in upper and lower lips opens onto inner surface
mixed gland on inner cheek region
pure mucous gland located in soft palate and posterior and lateral of hard palate none in anterior portion of palate
pure mucous gland from posterior lateral hard palate into anterior fold of tissue in front of palatine tonsils
there are three of these, and they are anterior, von ebner, and posterior.
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
mucous gland located around lingual tonsils on posterior third of tongue