The Committee on the Status of Endangered Species, a federal advisory group, has created a list of 340 animals and plants that are in some jeopardy. Here are the categories the committee uses: Extinct  The species no longer exists in Canada.
The front teeth are called incisors, You have four incisors on the top jaw and bottom jaw. the central incisors (the front two teeth) the lateral incisors (the teeth on either side of the central incisors) they have multiple functions. your smile, having a full set of teeth will give you an even smilwe.
Some rodents such as guinea pigs and rabbits have continuously growing molar teeth as well as continuously growing incisors. Teeth (sometimes called dentes) are accessory organs of the human digestive system. They are located in the buccal cavity, which is also known as the oral cavity and as the mouth.There are normally four types of teeth in an adult human mouth. Teeth are the organs of chewing, which is also known as mastication.Teeth cut, tear and grind food in the mouth, enabling it to be mixed with saliva (from the salivary glands) effectively and therefore swallowed more easily. The actions performed by the teeth are all mechanical-as opposed to chemical.he actions of the teeth (incl. cutting, tearing and grinding) increase the surface area of the food in the mouth. This enables the digestive enzymes greater access to the food material and so assists their role in the digestive process. Humans usually develop two sets of teeth over a lifetime-so we are diphyodonts.