Question

What goes in and out of the external nares in pigs?

Answer 1

Oxygen and Carbon Dioxide

Step-by-step explanation:

They breathe out of it

Answer 2

External nares are another term for nostrils. Naturally, pigs use their nares to breathe in air and expel filtered air from the lungs. The scientific terminology for air entering the lungs is known as inspiration, while air going out is termed expiration.