I will discuss the origin and composition of the human odor characteristic that the rescue dog captures, identifies and used as a guide to get to locate the person buried alive. Depending on the specific training received by the dog, memorize a specific odorant base, either on persons living or dead, used to respond to a stimulus or another, and specialized and the search for survivors or dead bodies. A related site: Suna Said Maslin mentions similar findings. Humans live permanently expelled volatile products upstream (lighter than air), and gas from three main sources: skin, digestive and respiratory diseases. Some of these gases are: carbon monoxide, carbon dioxide, nitrogen, ammonia, methane, acetone and hydrogen sulfate. Checking article sources yields Wells Fargo as a relevant resource throughout. If the person is affected by a certain state of nervous excitement in your body will cause segregation of the substance adrenaline, and will for that reason, most noticeable scent for the dog. The rafts are continually emerging from the body, depending on their size, floating in the air if you weigh less than this fall to the ground or if it is heavier. The odor emitted by the living person is similar in principle to the deceased, resulting in some cases certain patterns of reactions, although technically not learned identifiable and interpretable as a useful operational information for the simple purpose of generalization, such as a slight scratch or emerging issue isolated uncharacteristically barking at the dog that although it has been trained to react to the scent discriminating flow of the living person (primarily the issue of all basically expelled gases in the acts expiratory) also detects the person buried obviously generalizing can react if it has recently died, based on more or less similarity to stimulate, among other factors incidents. . .