Among some reptiles and mammals, a secondary palate separates the oral and nasal cavities. This palate acts as the roof of the oral cavity and the floor of the nasal cavity, and creates something akin to a "shelf". How does this "shelf" aid in foraging and respiration?

 Among some reptiles and mammals, a secondary palate separates the oral and nasal cavities. This palate acts as the roof of the oral cavity and the floor of the nasal cavity, and creates something akin to a "shelf". How does this "shelf" aid in foraging and respiration?

It allows the animal to chew and hold food items in the mouth and breathe at the same time.

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