Here's a breakdown:
* Rodent incisors: These front teeth are designed for gnawing and are constantly growing throughout the rodent's life. They wear down from the front due to constant use, and the back part of the tooth continues to grow, maintaining a sharp edge.
* Horse molars: While not as sharp as incisors, horse molars also grow continuously. They have a complex surface with ridges and cusps that are designed for grinding tough plant material. As the horse chews, the molars wear down, but the roots continue to grow, ensuring the teeth stay at a functional length.
Here are some key differences:
* Location: Rodent incisors are at the front of the mouth, while horse molars are at the back.
* Shape: Rodent incisors are long and sharp, while horse molars are wider and flatter.
* Function: Rodent incisors are primarily for gnawing, while horse molars are for grinding.
While they have different functions and locations, both rodent incisors and horse molars rely on continuous growth to maintain their functionality throughout the animal's life.