What are the functions of the internal nares of the frog?

Since frogs breathe through their mouths the internal nares are used for when their mouths are closed so they can keep breathing! =)

The internal nares of a frog allow it to continue breathing while its mouth is closed.

frog can breath through these with it's mouth closed, can be opened or closed with sphincter muscles, not the anal muscle

When the frog is swimming, its can breath by only putting the tip of its nose out of the water. Uses it to breath

The nose leads to the pharynx through a pair of apertures known as the internal nares which forms a pathway for the air to reach the lungs for respiration.