Toothsome Terror
Dec 30, 2016 13:13:25 GMT
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Napoleon Bonaparte, Desophaeus, and 1 more like this
Post by Bismarck Jr on Dec 30, 2016 13:13:25 GMT
Teeth are hard structures in the oral cavity of vertebrates. With the teeth, food is grasped, crushed and crushed. They have in the vertebrates developed by the form-function principle. When people come as functions nor the phonation (in particular the S-sound) and social functions added.
Developmentally are teeth Ectodermal hard formations (derivative of the skin that have migrated into the mouth), by induction of the underlying mesenchyme of the neural crest arise. Here, the ectoderm provides the hard enamel, the mesenchyme, the remaining ingredients of the teeth such as dentin, cement, and periodontal ligaments. Collectively they are called teeth. They first appear in the pine mouths (fish and land vertebrates on). They evolved from the simple skin teeth of prehistoric fish. The shed teeth fused into hard structures with basal bone mass, Dentinkrone and inner pulp cavity. In the mammals (Mammalia) they make the modified residual of ectodermal exoskeleton phylogenetically older vertebrates represent. Primary are toothless the jawless fishes (Agnatha), up to the lampreys and hagfish have become extinct. Become secondary toothless are the turtles, birds and Ursäuger (monotremes, egg-laying mammals). Mammals use unlike other vertebrates (fish, amphibians, birds) teeth not only to touch, but also for crushing (chewing) food.
In the animal kingdom one distinguishes real and faux teeth.
The real teeth made of enamel (filmstrip final), dentin and cement and pulp (pulp). They are also called dentine, because the dentin the major ingredient forms (see heterodontes teeth).
The fake teeth the hard tissues of enamel, dentine and cement is missing. It usually is Horn teeth, such as those in the throat and in the esophagus of leatherbacks are found. Primitive rootless teeth come in fish, amphibians and reptiles in front and make the basic type of the teeth. They may take the form of slightly pointed, conical have conical teeth that sharks edged or more ragged, with fish to plaster teeth in snakes fangs reshuffled may be (see homodontes teeth).
Vulgo is also described as "false teeth" also various kinds of dentures in humans.
Developmentally are teeth Ectodermal hard formations (derivative of the skin that have migrated into the mouth), by induction of the underlying mesenchyme of the neural crest arise. Here, the ectoderm provides the hard enamel, the mesenchyme, the remaining ingredients of the teeth such as dentin, cement, and periodontal ligaments. Collectively they are called teeth. They first appear in the pine mouths (fish and land vertebrates on). They evolved from the simple skin teeth of prehistoric fish. The shed teeth fused into hard structures with basal bone mass, Dentinkrone and inner pulp cavity. In the mammals (Mammalia) they make the modified residual of ectodermal exoskeleton phylogenetically older vertebrates represent. Primary are toothless the jawless fishes (Agnatha), up to the lampreys and hagfish have become extinct. Become secondary toothless are the turtles, birds and Ursäuger (monotremes, egg-laying mammals). Mammals use unlike other vertebrates (fish, amphibians, birds) teeth not only to touch, but also for crushing (chewing) food.
In the animal kingdom one distinguishes real and faux teeth.
The real teeth made of enamel (filmstrip final), dentin and cement and pulp (pulp). They are also called dentine, because the dentin the major ingredient forms (see heterodontes teeth).
The fake teeth the hard tissues of enamel, dentine and cement is missing. It usually is Horn teeth, such as those in the throat and in the esophagus of leatherbacks are found. Primitive rootless teeth come in fish, amphibians and reptiles in front and make the basic type of the teeth. They may take the form of slightly pointed, conical have conical teeth that sharks edged or more ragged, with fish to plaster teeth in snakes fangs reshuffled may be (see homodontes teeth).
Vulgo is also described as "false teeth" also various kinds of dentures in humans.
