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Teat. Teats protruding from the udder of a cow. Part of a milking device that fits over the teats of a cow. A teat is the projection from the mammary glands of mammals from which milk flows or is ejected for the purpose of feeding young. [1][2][3] In many mammals, the teat projects from the udder. The number of teats varies by mammalian species ...
Dental anatomy is a field of anatomy dedicated to the study of human tooth structures. The development, appearance, and classification of teeth fall within its purview. (The function of teeth as they contact one another falls elsewhere, under dental occlusion.) Tooth formation begins before birth, and the teeth's eventual morphology is dictated ...
Human teeth function to mechanically break down items of food by cutting and crushing them in preparation for swallowing and digesting. As such, they are considered part of the human digestive system. [1] Humans have four types of teeth: incisors, canines, premolars, and molars, which each have a specific function.
A tooth (pl.: teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food.Some animals, particularly carnivores and omnivores, also use teeth to help with capturing or wounding prey, tearing food, for defensive purposes, to intimidate other animals often including their own, or to carry prey or their young.
Parts of a tooth, including the enamel (cross section). Tooth enamel is one of the four major tissues that make up the tooth in humans and many animals, including some species of fish. It makes up the normally visible part of the tooth, covering the crown. The other major tissues are dentin, cementum, and dental pulp.
Tooth impaction. An impacted tooth is one that fails to erupt into the dental arch within the expected developmental window. Because impacted teeth do not erupt, they are retained throughout the individual's lifetime unless extracted or exposed surgically. Teeth may become impacted because of adjacent teeth, dense overlying bone, excessive soft ...
The name Tết is a shortening of Tết Nguyên Đán, literally written as tết (meaning festivals; only used in festival names) and nguyên đán which means the first day of the year. Both words come from Sino-Vietnamese respectively, 節 (SV: tiết) and 元旦. The word for festival is usually lễ hội, a Sino-Vietnamese word, 禮會.
Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. [1] That is, the number, type, and morpho-physiology (that is, the relationship between the shape and form of the tooth in question and its inferred ...