* Evaporation: When a dog pants, it breathes rapidly, increasing airflow over its tongue and moist respiratory passages. This accelerates the evaporation of saliva and moisture from the lungs.
* Cooling Effect: Evaporation requires heat energy, which it draws from the dog's body, leading to a cooling effect. This is similar to how sweating cools us down.
* Efficient Cooling: Dogs lack sweat glands, so panting is their primary mechanism for cooling. The large surface area of their tongue makes it an ideal surface for evaporative cooling.
Why they stick their tongues out:
* Maximize Surface Area: Protruding the tongue increases its surface area exposed to air, maximizing the evaporation process.
* Increased Airflow: Panting also draws cool air into the mouth, further enhancing cooling.
When it's more than just being hot:
Panting can also be a sign of other health issues like:
* Stress or anxiety:
* Pain:
* Respiratory problems:
* Heart problems:
* Overexertion:
If your dog is panting excessively, especially if accompanied by other symptoms like lethargy, vomiting, or diarrhea, it's crucial to consult a veterinarian.