Evaporated Cooling
This is a method touched upon in other page. It is the way
in which birds and mammals cool down via water evaporating from the surface of
the skin, as the canine, coyote pants air will rhythmically move over the
m0oist surfaces of the mouth throat and tongue, the moisture on these surfaces
will evaporate thus cooling the surface, the animals will have abundant already
dilated blood vessels near to the surface or these areas and they too will
become cooled by the panting and subsequent evaporation, the cooled blood with then
circulate around the body of the animals. (Siminski, 2015)
Owls will flap their loos skin under their throat moving air over the mouth, this will achieve the same goal as panting and is called the gular fluttering both these example are highly effective as they produce very little heat themselves, the brain of the sheep cat and dogs are extremely sensitive to heat for the sheep is the network of small blood vessels called the carotid rete and this is located in the hypothalamus, its function is to cool the blood before it reaches the brain of the sheep, this carotid artery carries hot blood from the heart to the and branches many times throughout the rete. Cooled blood leaving the brain and the sinus cavity also passes through the rete, heat is transferred from the hot blood to the cool blood ensuring the correct blood temperature before entering the brain. (Jones, 2007) in the dog it is the blood vessels in the nasal passage which results in the cooling of the blood top the brain, the brain of the a dog who has just exercised will be cooler than the rest of its body of example. (Siminski, 2015)
A vulture uses evaporative cooling in a totally different way. It will urinate down its legs if the day time temperature reaches above 700F (210C, the urine will evaporate, cooling the legs and drawing more heat from the body of the vulture (Siminski, 2015)
Owls will flap their loos skin under their throat moving air over the mouth, this will achieve the same goal as panting and is called the gular fluttering both these example are highly effective as they produce very little heat themselves, the brain of the sheep cat and dogs are extremely sensitive to heat for the sheep is the network of small blood vessels called the carotid rete and this is located in the hypothalamus, its function is to cool the blood before it reaches the brain of the sheep, this carotid artery carries hot blood from the heart to the and branches many times throughout the rete. Cooled blood leaving the brain and the sinus cavity also passes through the rete, heat is transferred from the hot blood to the cool blood ensuring the correct blood temperature before entering the brain. (Jones, 2007) in the dog it is the blood vessels in the nasal passage which results in the cooling of the blood top the brain, the brain of the a dog who has just exercised will be cooler than the rest of its body of example. (Siminski, 2015)
A vulture uses evaporative cooling in a totally different way. It will urinate down its legs if the day time temperature reaches above 700F (210C, the urine will evaporate, cooling the legs and drawing more heat from the body of the vulture (Siminski, 2015)