Structure of tooth and dentition in mammalia?

Mammalian teeth are typically heterodont, meaning they have different types of teeth that are specialized for different functions. The structure of a typical mammalian tooth includes:

1. Crown: The visible part of the tooth that is covered in enamel, the hardest substance in the body. The crown is used for biting and chewing food.

2. Neck: The area where the crown meets the root of the tooth.

3. Root: The part of the tooth that is embedded in the jawbone and holds the tooth in place.

4. Pulp cavity: The innermost part of the tooth that contains nerves and blood vessels.

Mammalian dentition can vary depending on the species, but most mammals have four types of teeth:

1. Incisors: Front teeth that are used for cutting and biting food.

2. Canines: Pointed teeth that are used for tearing and holding onto food.

3. Premolars: Flat teeth that are used for grinding and crushing food.

4. Molars: Larger flat teeth that are also used for grinding and crushing food.

The number and arrangement of these teeth can vary among different mammalian species, depending on their diet and feeding habits. For example, herbivores typically have more molars for grinding plant material, while carnivores have more pointed canines for tearing meat.