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Archive for the day “November 17, 2012”

Bits and Bites – Teeth: Part One – General information

Source:    http://www.ket.org/trips/dentist/animalteeth.htm

Animal teeth are adapted for getting and chewing food. They can also be used for other purposes, such as protection or even building their homes!

Animals that eat meat are called carnivores. They have large canine teeth to hold and tear meat. Wolves, tigers, cats, and dogs are carnivores and have lots of sharp canine teeth. They need these strong, sharp teeth for catching and holding their prey. They bite their prey and tear the meat into pieces. They do not chew their food well, swallowing it whole or in large chunks. Some fish have teeth to help them catch their prey.

Animals that eat only plants are called herbivores. A herbivore’s long front incisors have sharp edges that are good for cutting grass and leaves. They have large molars at the back of their mouths for grinding and crushing the stems, leaves, fruits, seeds, and roots of plants. Their flat molars are used for grinding the plants. The long front incisors of beavers and squirrels can break into nuts and seeds. Squirrels crack nutshells with their teeth. (Don’t you try that!) Beavers, squirrels, and other rodents have teeth that keep growing all their lives. They sharpen their teeth by gnawing as they eat. Grazing animals such as horses, cows, and sheep need their large back molars for grinding up grass and grain.

Animals that eat both plants and animals are called omnivores. They have both canines and molars. Are you a carnivore, a herbivore, or an omnivore? Animals have a much simpler diet than people do.

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Bits and Bites – Teeth: Part Two – the Structure & Function of Human Teeth

anatomy of a human tooth

Extract from  Online Britannica

Tooth, plural teeth,  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. A tooth consists of a crown and one or more roots. The crown is the functional part that is visible above the gum. The root is the unseen portion that supports and fastens the tooth in the jawbone. The root is attached to the tooth-bearing bone—the alveolar processes—of the jaws by a fibrous ligament called the periodontal ligament or membrane. The “neck” of the root is embraced by the fleshy gum tissue (a specialized area of connective tissue covered with mucous membrane that lines the mouth cavity). The shape of the crown and root vary among different teeth and among different species of animals.

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Bits and Bites – Teeth: Part Three – Teeth Numbering & Cats and Dogs

How many teeth does a human adult have?

32

How many teeth does my cat have?

30

How many teeth does my dog have?

42

For diagrams of the teeth of cats, dogs, and horses, visit this wonderful page   here  ( URL below also ).

http://www.bradfordfamilydentist.ca/human-teeth-vs-dog-cat-horse-dental-charts/#CAT

Universal Tooth Numbering System

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