Incisor
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Incisors are the front teeth present in most mammals. They are located in the premaxilla above and on the mandible below. Humans have a total of eight. Opossums have 18, whereas armadillos, anteaters
Arrangement of incisors in an adult human.
Mouth (oral cavity)
Rodent
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Rodents are a group of mammals belonging to the order Rodentia characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. Rodents make up about 40% of all mam
Incisor
…animals, the number varies from species to species. Opossums have 18, whereas armadillos have none. Cats, dogs, foxes, pigs, and horses have twelve. Rodents have four. Rabbits and hares (lagomorphs) were once considered rodents, but are distinguished by having six—one small pair, called "peg teeth", is…
Hydrochoeris hydrochaeris in Brazil in Petrópolis, Rio de Janeiro, Brazil 09
Springharelg
Goldmantelziesel
American Beaver