The respiratory rate which is the number of breaths a person taken in one minute is fixed at an average of around 12 every minute for adults. Any increase in temperature causes a rise in the quantity of oxygen that is liberated by the presence of hemoglobin in the blood. One of the byproducts of cells’ metabolic reactions is heat. This heat which is released due to the constricting fibers of the muscle is likely to increase the temperature of the body.

Metabolically energetic cells need more oxygen and release more heat and acids. This in turn leads to the increased release of oxygen from oxyhemoglobin which is nothing but oxy combined with the hemoglobin present in blood.

Since the hemoglobin present in the blood releases more oxygen with any rise in the temperature of the body, the rate of respiration witnesses acceleration too. This goes on to explain that why one breathes with a faster pace during fever. On the contrary, during hypothermia, which is the term given to the state of low body heat; cellular metabolism dwindles down and the requirement of oxygen is condensed, and additional oxygen remains intact with the hemoglobin. Respiration is the procedure through which oxidation of food takes place and heat energy, water vapor and carbon dioxide is released.

These procedures are interceded by certain 'enzymes' which are nothing but proteins. Enzymes present in human beings body inquisitively enough exert most competently at 37 degrees Celsius. So even though there are acclimatized reactions to temperature alterations like panting and trembling, the respiration rate attains a maximum at body heat and turns down speedily after that like at a body heat of above 42 degrees Celsius one’s muscles etc start to burn, the proteins known as denature.

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