Rabbits' mouths are called "triple mouths" because their upper and lower incisors are composed of two small incisors and one large incisor respectively. In other words, the rabbit has a total of 6 incisors, of which the front 4 small incisors are arranged in two rows, and the back 2 large incisors are arranged alone on both sides.
This chewing system is very important for rabbits because they are vegetarian animals and need to constantly chew fibrous plants to consume their teeth, maintain oral health, and keep their digestive systems functioning properly. Rabbits' incisors can constantly grow and adjust themselves to suit their dietary needs through cutting, grinding, and wear.
Therefore, rabbits' "three-petal mouth" is a unique evolutionary feature that allows them to eat more herbs, ensuring adequate nutritional intake, and also helping them maintain oral health.
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