Teeth (Anatomy): Definition, Function and Structure - Biology …
2017年9月7日 · Teeth are hard, mineral-rich structures which are used to chew food. They are not made of bone like the rest of the skeleton, but have their own unique structure to enable them to break down food. Tooth enamel is the most mineralized tissue in the body, consisting mainly of the rock-hard mineral hydroxyapatite.
Tooth - Wikipedia
A tooth (pl.: teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food.
Mammal tooth - Wikipedia
Most extant mammals including humans are diphyodonts, i.e. they have an early set of deciduous teeth and a later set of permanent or "adult" teeth. Notable exceptions are elephants, kangaroos, and manatees, all of which are polyphyodonts, i.e. …
Animal Teeth: A Guide to Different Types and Their Functions
Have you ever wondered why some animals have sharp, pointy teeth, while others have flat, grinding teeth? It all comes down to what they eat! Just like humans, animals have evolved different types of teeth to help them survive and thrive in their environments.
Mammal Teeth: The Different Types Of Tooth - Earth Life
2020年4月7日 · Teeth in mammals come in four different sorts: Incisors, Canines, Premolars and Molars. Not all mammals have all, or even any, of them and the roles any particular sort of teeth play in an animal’s life can be quite diverse. The arrangement of teeth in any given mammals mouth can be expressed as a ‘dental formula’.
Tooth | Definition, Anatomy, & Facts | Britannica
tooth, any of the hard, resistant structures occurring on the jaws and in or around the mouth and pharynx areas of vertebrates. Teeth are used for catching and masticating food, for defense, and for other specialized purposes. The teeth of vertebrates represent the modified descendants of bony dermal (skin) plates that armoured ancestral fishes.
Teeth – Morphology of the Vertebrate Skeleton
Learn basic tooth anatomy and terminology. Identify the types of teeth in heterodont mammalian dentition and identify the cusps and features of molar teeth (with particular emphasis on tribosphenic molars). Describe the dental formula of a dentition and use dental formulae to distinguish marsupials from placentals.
The Diversity of Cheek Teeth - ADW
Upper teeth with four main cusps, protocone, paracone, metacone, and hypocone, are termed quadrate, quadritubercular, or euthemorphic. These teeth are found in many kinds of mammals. Especially good examples can be seen in hedgehogs (Erinaceidae), raccoons (Procyonidae), and many monkeys (e.g., Hominidae, Cercopithecidae, Cebidae).
Differentiation of teeth in an individual - ADW
We recognize four basic kinds of teeth in an individual's jaw, the incisors, canines, premolars, and molars. These are shown in the illustration at the bottom of this page. Incisors -- These are the most anterior teeth.
Animal tooth development - Wikipedia
Tooth development or odontogenesis is the process in which teeth develop and grow into the mouth. Tooth development varies among species. In fish, Hox gene expression regulates mechanisms for tooth initiation. [1][2] However, sharks continuously produce new teeth throughout their lives [3][4][5] via a drastically different mechanism.