Question

In what situation would the location of the frog's nares can be an advantage in breathing?

Answer 1

Internal nares are on the roof of a frog's mouth. Air passes from the external nares into the mouth through these openings. They can be closed using a sphincter muscle when the frog is submerged under water to prevent water from entering the mouth and therefore the lungs.

Answer 2

Breathing Without Nares

A frog also can breathe by absorbing oxygen through its skin. Small blood vessels called capillaries that are under the outer skin layer absorb oxygen from the water. Some frogs use this method of breathing when they must be submerged for longer periods of time, such as during breeding seasons.