Flashcards in Digestive System - Oral Cavity Deck (52):
what are the 4 layers of the digestive tract?
what are 4 important functions of the alimentary mucosa?
where is the vestibule in the oral cavity?
space b/w the lips, cheeks and teeth
where is the oral cavity proper in the oral cavity?
space behind the teeth
which glands have a capsule?
what are the major salivary glands?
What are the minor salivary glands?
what are found surrounding the acini of the minor glands?
plasma cells and lymphocytes
what are the 4 parts of the salivon?
what are the 3 types of acini?
what part of the salivon is well developed in serous glands?
what part of the salivon is NOT well developed in mucous glands?
what is the large duct of the parotid gland that enters the oral cavity?
secretory units of the parotid duct are completely _____ and surround numerous, long _____
serous; intercalated ducts
what is mumps?
a viral infection of the parotid gland that could damage the facial nerve
what is the main duct in the submandibular gland?
what kind of the gland is the submandibular gland?
what kind of gland is the sublingual gland?
predominately mucous gland
what are the 5 main functions of saliva?
moistens food and oral cavity
stimulates taste buds
what enzyme lyses bacteria in saliva?
what bacteria digests carbs in saliva?
what immunoglobulin is found in saliva?
What are myoepthelial cells?
contractile cells that move secretory products toward the excretory duct
what two rings are tonsils organized into?
Waldeyer's lymphatic ring
where is the masticatory mucosa?
in the hard palate + gums
what are the 2 types of epithelium in the masticatory mucosa?
keratinzed stratified squamous epithelium
what is parakeratinized epithelium?
similar to keratinized but the superficial cells do not loose their nuclei
what does the keratinized epithelium in the masticatory mucosa lack?
what type of epithelium is the lining mucosa?
generally nonkeratinized but may be parakeratinized
what are the 3 layers in the nonkeratinized epithelium?
melanocytes are derived from what origin?
Neural crest cells
what are merkel cells?
modified epidermal cells in the stratum basale
how do the muscle fibers of the tongue run?
in three planes perpendicular to one another
what are the smooth dark bulges on the posterior side of the dorsal tongue?
lingual tonsils in the lamina propia
what divides the tongue into anterior 2/3 and posterior 1/3?
what is the apex of the terminal sulcus?
what are the papillae that are only really found in bunnies?
which papillae look like mushrooms?
which papillae look like a large dome and have a moat around them?
which papillae are the smallest and most numerous?
what is the small opening at the apex of the taste bud?
what are the 3 cell types in taste buds?
what are neuroepithelial cells in taste buds?
cells from the basal lamina to the taste pore w/ microvilli that synapse w/ CN 7, 9, and 10
what origin is enamel?
what origin are most structures of the teeth?
mesoderm/ neural crest cells
what are the 3 specialized layers of teeth?
what secretes dentin?
what is cemtum?
thin, pale, yellowish layer of calcified AVASCULAR tissue covering teh dentin of the root of tooth
what secretes cementum?
what is the only sensory modality recognized by teeth?
pain (nerve fibers are unmyelinated)
where do nerve fibers and blood vessels enter teeth?