Term
| stratified squamous epithelium |
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Definition
| at entrance of nasal passageways |
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Term
| conducting respiratory epithelium |
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Definition
| further back in nasal cavity |
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Definition
| most abundant cells of the conducting portion of respiratory epithelium |
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Definition
| secrete mucous to keep out dust and bacteria. located in conducting portion of respiratory epithelium. |
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Definition
| do not extend to surface. can differentiate to replace other cell types |
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Term
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Definition
| microvilli on luminal surface thought to be chemosensory receptors |
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Term
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Definition
| neuroendocrine cells. difficult to distinguish ini standard preps. secrete hormones into the lamina propria across basement membrane so they can make their way into capillaries. |
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Definition
| lies directly on underlying structures (bone, cartilage, or muscle). contains abundant serous and mucous glands. aggregates of lymphoid nodules |
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Term
| cavernous or erectile tissue |
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Definition
| thin walled blood vessles in lamina propria. each side alternately becomes engorged with blood thereby only allowing breathing through the opposite side by leaking out fluid to moisten the aire. throughout the day you switch back and forth between nostrils. it's the enlargement of hte veins that causes one side to be constricted so air does not flow in that nostril. |
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Term
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Definition
| located in roof of nasal cavity covering the superior nasal conchae. has many more cell layers than pseudostratified. |
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Definition
| able to replenish other cell types |
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Term
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Definition
| bipolar neurons which end in olfactory knob. modified and nonmotile cilia provide for interaction with odiferous molecules. |
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Term
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Definition
| permanent loss of smell because axons cannot pass into skull |
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Term
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Definition
| call ciliated columnar cells. provide support to olfacory cells. stereocilia form a tangled mat intermingled with olfactory cilia. form junction complexes on lateral apical surface with olfactory cells. provide structureal and physiological support. |
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Term
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Definition
| serous glands on lamina propria allow odiferous molecules to be dissolved on surface |
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Term
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Definition
| bilateral cavities in frontal, sphenoid, maxillary and ethmoid bones. all have drainage into nasal cavities |
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Term
| lining of paranasal sinuses |
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Definition
| conducting respiratory mucosa with fewer goblet cells and lamina propria thinner with small scarce glands |
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Term
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Definition
| buildup of mucous within paranasal sinuses due to inflammation or blockage of draining orifices |
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Term
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Definition
| lined with conducting respiratory mucosa |
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Term
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Definition
| occurs in the connective tissue deep to the epithelium of the GI and respiratory tracts. also present in the stroma of virtually all internal organs when infection is present. |
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Term
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Definition
| dense spherical aggregates of lymphocytes typically located among diffuse lymphoid tissue. nonpermanent structures (come and go according to immunological needs). |
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Term
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Definition
| lightly staining centers of some nodules. represent active proliferation of B cells |
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Term
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Definition
| form right of Waldeyer within the URT. |
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Term
| palatine and lingual tonsils |
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Definition
| covering epithelium is stratified squamous |
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Term
| pharyngeal and tubal tonsils |
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Definition
| covering epithelium is psudostratified |
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Term
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Definition
| mucosa highly invaginated. important in generating a large immunological library. surrounded by diffuse and nodular lymphoid tissue |
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Term
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Definition
| collagenous capsule separates tonsils from underlying tissues |
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Term
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Definition
| nodules greatly enlarged with germinal centers during infection |
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Term
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Definition
| hollow column of dentin. 70% in the form of calcium hydroxyapatites making it harder than bone. dentin not remodeled like bone so it remains if odontoblasts destroyed by disease. |
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Term
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Definition
| layer of cells that line inner surface of dentin. secrete predentine which gets mineralized to form dentin. secretes throughout lifespan. |
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Term
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Definition
| long narrow odontoblast processes that radiate through the entire depth of the dentin. changes in permeability sensed as pain. |
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Term
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Definition
| hollow within center of dentin. filled with connectie tissue that contains blood vessles and nerves that entered through root canal |
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Term
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Definition
| region of tooth that extends into oral cavity |
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Term
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Definition
| embryonic cells that form enamel in cooperation with enamel organ. do not persist after tooth has erupted. |
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Term
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Definition
| 98% calcium hydroxyapatites (hardest substance in the body). each ameloblast secretes a single prism that extends through the entire depth of the enamel |
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Term
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Definition
| region of tooth that extends through the gingiva and into the alveolus |
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Term
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Definition
| thick collagen fibers that anchors tooth into alveolus. distributes forces of mastication to prevent bone reabsorption. differs from normal ligament. highly cellular, vascularized and innervated. high rate of collagent turnover. fibers embedded into periosteum to connect to bone. connected to tooth via cementum |
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Term
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Definition
| produce bone like material. appear similary to osteocytes with lacunae but lacking canaliculi. remodeled like bone according to physical stress |
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Term
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Definition
| tube traversing from auricle to tympanic membrane. lined by skin, ceruminous glands, wall reinforced by elastic cartilage (superficial 1/3) or bone (deep 2/3). |
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Term
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Definition
| modified apocrine sweat glands that secrete cerumen into hair follicles or directly onto surface |
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Term
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Definition
| fibrous membrane that separates external auditory canal from cavity of middle ear |
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Term
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Definition
| small nontense area located superiorly |
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Term
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Definition
| tense region. firmly attached to the annulus fibrocartilaginous |
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Term
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Definition
| consists of thin, hairless skin. most external layer |
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Term
| intermediate fibrous layer |
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Definition
| consists of two layers of specialized fibers. outer layer arranged radially, inner layer arranged circularly |
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Term
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Definition
| simple cuboidal epithelium with thin underlying lamina propria. most internal layer of tympanic membrane. |
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Term
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Definition
| endochondrial bone lined with either simple cuboidal or pseudostratified epithelium with a thin underlying lamina propria |
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Term
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Definition
| composed of three coiled tubes. contains the auditory sense organ |
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Term
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Definition
| originates at oval window. filled with perilymph |
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Term
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Definition
| separated from scala vestibuli by Reissner's membrane. filled with endolymph. contains organ of corti. |
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Term
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Definition
| maintains ionic concentratio in scala media. stratified squamous epithelium with highly vascularized lamina propria |
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Term
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Definition
| separated from scala media by basilar membrane. filled with perilymph |
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Term
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Definition
| contains cell bodies of bipolar neurons that give rise to CN8 |
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Term
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Definition
| rests on basilar membrane. hearing organ |
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Term
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Definition
| rests on top of hair cells. waves within endolymph cause it to depress cilia of hair cells |
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Term
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Definition
| provide foundation for tunnel of Corti |
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Term
| inner and outer phalangeal cells |
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Definition
| supportive role to hair cells |
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Term
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Definition
| otolith organs. cilia embedded within gelatinous glycoprotein layer. calcium carbonate crystals on top of glycoprotein layer, move in response to position of head and linear acceleration |
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Term
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Definition
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Term
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Definition
| superficial most layer nuclei |
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Term
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Definition
| structure similary to otolith organs, hair cells surrounded by supporting cells. sense organ for rotational acceleration. oriented along x,y,and z planes. rotation causes endolymph to reflect cupula in opposite direction which is detected by hair cells |
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Term
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Definition
| receptor organ within each semicircular canal |
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Term
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Definition
| cilia embedded within this large glycoprotein structure |
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