| Incisor | | | | Permanent teeth of right half of lower dental arch, seen from above. | | | | The permanent teeth, viewed from the right. | | Latin | dentes incisivi | | Gray's | subject #242 1115 | | MeSH | Incisor | Incisors (from Latin incidere, "to cut") are the first kind of tooth in heterodont mammals. They are located in the premaxilla. Image File history File links Gray997. ...
Image File history File links Gray1003. ...
For other uses, see Latin (disambiguation). ...
Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ...
A mans visible teeth. ...
The anatomical term heterodont (different teeth) refers to animals which possess more than a single tooth morphology. ...
Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the presence of sweat glands, including those that produce milk, and by the presence of: hair, three middle ear bones used in hearing, and a neocortex...
The premaxilla is a pair of small bones at the very tip of the jaws of many animals, usually bearing teeth, but not always. ...
Function
In many herbivorous or omnivorous mammals, such as the human and the horse, they are adapted for shearing sharply. In cats, the incisors are small and do not do much; biting off meat is done with the canines and the carnassials. In elephants, the upper incisors are modified into curved tusks, just as is the case with Narwhals, where normally one of them develops into a straight and twisted tusk. The incisors of rodents grow throughout life and are worn by gnawing. In zoology, an herbivore is an animal that is adapted to eat primarily plants (rather than meat). ...
Omnivores are organisms that consume both plants and animals. ...
Binomial name Equus caballus Linnaeus, 1758 The horse (Equus caballus, sometimes seen as a subspecies of the Wild Horse, Equus ferus caballus) is a large odd-toed ungulate mammal, one of ten modern species of the genus Equus. ...
Binomial name Felis catus Linnaeus, 1758 Synonyms Felis lybica invalid junior synonym The cat (or domestic cat, house cat) is a small carnivorous mammal. ...
In mammalian oral anatomy, the canine teeth, also called cuspids, dogteeth, fangs, or (in the case of those of the upper jaw) eye teeth, are relatively long, pointed teeth. ...
Carnassials are large teeth found in carnivorous mammals, designed for shearing flesh and bone in a scissor-like way. ...
Genera and Species Loxodonta Loxodonta cyclotis Loxodonta africana Elephas Elephas maximus Elephas antiquus †Elephas beyeri †Elephas celebensis †Elephas cypriotes †Elephas ekorensis †Elephas falconeri †Elephas iolensis †Elephas planifrons †Elephas platycephalus †Elephas recki †Stegodon †Mammuthus †Elephantidae (the elephants) is a family of pachyderm, and the only remaining family in the order Proboscidea...
For other uses, see Tusk (disambiguation). ...
Binomial name Linnaeus, 1758 Narwhal range (in blue) The Narwhal (Monodon monoceros) is an Arctic species of cetacean. ...
Suborders Sciuromorpha Castorimorpha Myomorpha Anomaluromorpha Hystricomorpha Rodentia is an order of mammals also known as rodents, characterised by two continuously-growing incisors in the upper and lower jaws which must be kept short by gnawing. ...
Number and types of incisors
In humans Humans normally have eight (8) incisors, two of each type. The types of incisors are: This article is about modern humans. ...
The maxillary central incisor is usually the most visible tooth, since it is the top center two teeth in the front of a mouth, and it is located mesial (closer to the midline of the face) to the maxillary lateral incisor. ...
The maxillary lateral incisor is the tooth located distally (away from the midline of the face) from both maxillary central incisors of the mouth and mesially (toward the midline of the face) from both maxillary canines. ...
The mandibular central incisor is the tooth located adjacent to the midline of the face and is mesial (toward the midline of the face) from both mandibular lateral incisors. ...
The mandibular lateral incisor is the tooth located distally (away from the midline of the face) from both mandibular central incisors of the mouth and mesially (toward the midline of the face) from both manibular canines. ...
In animals Among other animals, some other primates, cats and horses have twelve. The rodents have four. Rabbits and hares (lagomorphs) were once considered rodents, but are distinguished by having eight--1 small pair, called "peg teeth" is directly behind the most anterior pair. Families 15, See classification A primate is any member of the biological order Primates, the group that contains all the species commonly related to the lemurs, monkeys, and apes, with the latter category including humans. ...
Suborders Sciuromorpha Castorimorpha Myomorpha Anomaluromorpha Hystricomorpha Rodentia is an order of mammals also known as rodents, characterised by two continuously-growing incisors in the upper and lower jaws which must be kept short by gnawing. ...
Families Leporidae Ochotonidae The Lagomorphs, order Lagomorpha, are an order of mammals of which there are two families, Leporidae (hares and rabbits), and Ochotonidae (pikas). ...
The Rodent incisor The rodent incisor is one of the evolutionary adaptations that make rodents such a successful group. There are two incisors in the upper jaw and two in the lower jaw. The incisors are separated from the molars by a diastema region, an area without any teeth. The tissue of the incisor is regenerated from the apical end and constantly wears down at the distal tip. The ever-growing incisor can be subdivided into two areas, the crown analogue and the root analogue. Diastema is a slight gap or space between two teeth. ...
The crown analogue is the labial half of the incisor. It is characterized by an enlarged cervical loop at the apical end. The cervical loop is the epithelial stem cell niche. The epithelial progeny of the crown analogue's cervical loop differentiates into ameloblasts that produce enamel.
The root analogue is the lingual half of the incisor. It's cervical loop is much smaller and the epithelium does not differentiate into ameloblasts, but instead forms a root sheath and fragments into epithelial cell rests of Malassez typical of root epithelium. The root analogue is covered in dentin and cementum like a normal root.
Additional images Mouth (oral cavity) Image File history File links Illu_mouth. ...
| Left maxilla. Outer surface. File links The following pages link to this file: Maxilla Wikipedia:Grays Anatomy images with missing articles 4 Categories: Public domain images ...
| Base of skull. Inferior surface. Image File history File links Download high-resolution version (718x1169, 147 KB) Source Originally from en. ...
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See also | General anatomy of head and neck - head | | Face/Occiput | Forehead • Eye • Ear • Temple • Cheek • Chin | | External nose | Nostril • Nasal septum • Cartilages (Accessory nasal, of the septum, Greater alar, Lateral nasal, Lesser alar, Vomeronasal) • Olfactory glands | | Nasal cavity | Choana • Turbinate • Sphenoethmoidal recess • Ethmoid bulla • Hiatus semilunaris • Ostium maxillare • Inferior meatus • Vomeronasal organ • Paranasal sinus | | Mouth/oral cavity | Lip • Philtrum • Jaw • Pterygomandibular raphe | | Teeth | Permanent (Incisor, Canine, Premolar, Molar) • Deciduous | | Tongue | Plica fimbriata • Median sulcus • Foramen cecum • Terminal sulcus • Frenulum linguae • Anterior tongue • Posterior tongue | | Palate/roof of mouth | Hard palate • Soft palate • Palatine raphe • Incisive papilla • Uvula • Pharyngeal recess • Arches (Palatoglossal, Palatopharyngeal) | | Salivary glands | Parotid gland/Parotid duct • Submandibular gland/Submandibular duct • Sublingual gland/Major sublingual duct | | Other | fascia (Masseteric fascia, Temporal fascia, Galea aponeurotica) • Scalp | |
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