organ /or·gan/ (or´gan) a somewhat independent body part that performs a special function.
enamel organ,
enamel, opacity, (white spot)
organ of Corti the organ lying against the basilar membrane in the cochlear duct, containing special sensory receptors for hearing, and consisting of neuroepithelial hair cells and several types of supporting cells. Called also spiral o. 
)
Detail of the organ of Corti (spiral organ) in the cochlear duct in the inner ear.
effector organ effector (2).
end organ end-organ.
enamel organ a process of epithelium forming a cap over a dental papilla and developing into the enamel.
genital organs reproductive o's.
Golgi tendon organ any of the mechanoreceptors arranged in series with muscle in the tendons of mammalian muscles, being the receptors for stimuli responsible for the lengthening reaction.
Jacobson's organ vomeronasal o.
reproductive organs the various internal and external organs that are concerned with reproduction.
rudimentary organ
1. a primordium.
2. an imperfectly or incompletely developed organ.
sense organs , sensory organs organs that receive stimuli that give rise to sensations, i.e., organs that translate certain forms of energy into nerve impulses that are perceived as special sensations.
spiral organ o. of Corti.
vestigial organ an undeveloped organ that, in the embryo or in some ancestor, was well developed and functional.
vomeronasal organ a small sac just above the vomeronasal cartilage; rudimentary in adult humans but well developed in many other animals.
Weber's organ prostatic utricle.
organs of Zuckerkandl para-aortic bodies.
| enamel organ n. A mass of ectodermal cells budded from the dental lamina. It develops the ameloblast layer of cells which produce the enamel cap of a developing tooth. |
enamel organ,
a complex epithelial structure on the dental papilla. It produces enamel for the developing tooth.
enamel, opacity, (white spot)
(ōpas´itē),
n a visibly lighter area on a tooth's surface; may be caused by fluorosis, or demineralization.
n a visibly lighter area on a tooth's surface; may be caused by fluorosis, or demineralization.
enamel organ,
n the part of a developing tooth germ that produces enamel.
enamel pearl,
n See pearl, enamel.
enamel spindles,
n.pl tubular projections from the dentinoenamel junction into the enamel, caused by penetration by odontoblasts before the junction is formed.
enamel tufts,
n.pl the brush-shaped projections from the dentinoenamel junction into the enamel, caused by crystallization defects.
enamel
the white, compact and very hard substance covering and protecting the dentine of the crown of a tooth.
enamel bulge
the area of greatest diameter of a tooth, just external to the gum line, which acts to deflect food from the free gingival margin and the gingival crevice.
enamel epithelium
epithelium which creates a bell-shaped enamel organ, surrounding the dental papilla; the internal epithelium consists of columnar ameloblasts which secrete enamel.
enamel hypoplasia
incomplete or partial development; a common defect in dogs.
inherited enamel defect
an inherited absence of enamel from all teeth combined with excessive flexibility of joints in Holstein-Friesian cattle. The teeth are pink and obviously deficient in substance. A defect in collagen formation is probable.
enamel layer
the outermost layer of cells of the enamel organ.
mottled enamel
dental fluorosis; defective enamel, with a chalky white appearance or brownish stain, caused by excessive amounts of fluorine in drinking water and food preparations during the period of enamel calcification.
enamel organ
an epithelial cap over a dental papilla that develops into the enamel-producing organ. The shape of the enamel organ determines the shape of the tooth.
enamel points
sharp projections of enamel at the junction of the buccal and occlusal surfaces of a tooth. Seen most commonly in horses.
enamel rods
progressively mineralized glycoproteinaceous tubules, the basic structural units of enamel; enamel is acellular and consists of interrod material and rods,
enamel spot
remnant of the enamel cup in the center of an incisor tooth table in a horse.
)
Enamel spot. By permission from Sack W, Wensing CJG, Dyce KM, Textbook of Veterinary Anatomy, Saunders, 2002
enamel works
factories manufacturing enamels or using them extensively; sources of fluorine for pollution of pasture and water.
organ
a somewhat independent body part that performs a specific function or functions.
organ of Corti
the organ lying against the basilar membrane in the cochlear duct, containing special sensory receptors for hearing, and consisting of neuroepithelial hair cells and several types of supporting cells.
effector organ
a muscle or gland that contracts or secretes, respectively, in direct response to nerve impulses.
enamel organ
see enamel organ.
female reproductive organ
paired ovaries, uterine tubes, uterus, vagina and vulva.
Golgi tendon organ
see golgi tendon organ.
gustatory organ
taste bud.
gustus organ
see taste bud.
organ of Jacobson
see vomeronasal organ (below).
male reproductive organ
paired testes, gonadal duct systems (epididymis, ductus deferens), accessory glands, urethra, penis, prepuce and scrotum.
ocular organ
see eye.
olfactory organ
the organ of smell in the nasal mucosa consisting of specialized cells with a tuft of very fine processes protruding into the nasal cavity. Internally they communicate with the olfactory nerves which pass through the cribriform plate of the ethmoid bone to synapse with cells in the glomeruli of the olfactory bulb of the brain.
sense o's, sensory o's
organs that receive stimuli that give rise to sensations, i.e. organs that translate certain forms of energy into nerve impulses which are perceived as special sensations.
solid organ
any organ which does not contain a cavity or lumen and which is not gaseous; that is an organ which consists of parenchyma and stroma, the latter often arranged as trabeculae or surrounding groups of parenchymatous cells to provide support, e.g. liver, kidney.
spiral organ
organ of Corti.
spiral organ of the inner ear
the cochlea.
subfornical organ
a small tubercle in the floor of the third ventricle.
target organ
the organ affected by a particular hormone.
tubular organ
an organ characterized by the presence of a lumen and four concentric tunics in its wall; centrifugally the layers are mucosal, submucosal, muscular and adventitia-serosal.
urinary organ's
vascular organ of the lamina terminalis
in the wall of the third ventricle of the brain.
vestibulocochlear organ
the cochlear duct, semicircular canals, utricle and saccule that occupy the osseous labyrinth.
vestigial organ
an undeveloped organ that, in the embryo or in some remote ancestor, was well developed and functional.
vomeronasal organ
part of the olfactory sense system that consists of a pair of fleshy tubes found on the floor of the nasal cavity on either side of the nasal septum, supported by cartilage sleeve. Probably concerned with scenting and aftersmell of food.
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