Question

Dogs generally hang out their tongue in summer.

Answer 1

Mammals regulate their body temperature by body temperature by sweating. Dogs have merocrine sweat glands located in dog’s paw pads.

Complete answer:
Dogs in extreme summers can suffer from dehydration, heat cramps, or heat stress hence to maintain their temperature they hang their tongue out. Dogs generally hang out their tongue in summer to regulate body temperature.

Additional Information:
-In summers, the atmospheric temperature is more than the body temperature and hence we feel so hot.
-Sweating is a very effective cooling mechanism. The evaporation of the moisture on the surface of many living creatures and thus cooling the body.
-Dogs cool themselves primarily through the process of panting and breathing. Pant is short and quick breathing. When dogs pant, the air passing over the saliva on their tongues helps them to cool.
-Tongues of dogs on exposure to the atmosphere enable the saliva to undergo ultimately giving the cooling effect.
-Dogs don’t have much sweat pores like humans on their body so dogs put their tongue out to get saliva to evaporate and feel cool.
-Besides, the lining of a dog’s lungs serves as an evaporative surface. Blood vessels in the face, ears, and feet can also expand, helping to release heat from the body.

Note:
-Summer is the warmest season of the year, which in the northern hemisphere is from June to August, and in the southern hemisphere is from December to February.
-A dog’s body temperature is normally between 100.2˚ and 102.8˚ Fahrenheit. If a dog’s temperature continues to above 106˚, heatstroke can occur which is a life-threatening condition and can cause lethargy, weakness, collapse, seizure, coma, brain damage, and even death.