Perseverance. Humans survive almost anywhere. They can be found in Mcmurdo station, where the yearly temperature ranges from an average of 27.5ᵒ F to -14.8ᵒ F (Mcmurdo, 2008). They are found in Tibet, where the average elevation is approximately 16, 400 ft. (Wittke, 2002). One of the hottest places on earth that is inhabited is Death Valley, California, where the temperature reaches 134ᵒ F (10, 2014). And of course, the lowest depth that Man has achieved so far is 6.8 miles by famed filmmaker James Cameron in the Marianas Trench in the Pacific Ocean (James, 2014). Humans live at the equator, near the North Pole and atop the highest mountains. There are even humans living in the International Space Station. Humans can live almost everywhere. How is this possible? Homeostasis is the answer. Homeostasis is equilibrium. It maintains the optimum body temperature and regulates all processes to keep within a certain range of values. If it is too hot the body has several mechanisms to cool itself down. For instance, the body sweats to cool off. Too cold? The body can heat itself up, the act of shivering stimulates heat production. Homoeostasis is the process by which the body maintains relatively constant conditions internally when the external environment changes (Simon, Reece & Dickey, 2012, p.466). Homeostasis is dynamic in that it does not have a set point, but rather a range of tolerable levels. All of the body’s systems work together to maintain homeostasis, which is necessary for life. Having a range is useful for the body’ defenses. For example, the inflammatory response, which raises the temperature of the surrounding area of the wound with red blood cells, causes the area to become red and swollen (Simon, Re... ... middle of paper ... ...s_4566459_human-body-maintain-homeostasis_.html. Rubella. (2013, February 21). A.D.A.M. Medical Encyclopedia. In PubMedHealth. Retrieved June 30, 2014, from http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002541/. Simon; Reece; Dickey, E. (2012). Campbell Essential Biology with Physiology [VitalSouce bookshelf version]. Retrieved from http://digitalbookshelf.southuniversity.edu/books/9781256902089/id/ch19lev2sec15 South University Online. (2014). Biology II: BIO1021: Week 5: Stages of Aging. Retrieved fromhttp://myeclassonline.com Wittke, J. (2002). Geology of the Tibetan Plateau. In Tibet: A Virtual Field Trip. Retrieved June 30, 2014, from http://oak.ucc.nau.edu/wittke/Tibet/Tibet.html. Zimmermann, K. (2013, January 22). Endocrine System: Facts, Functions and Diseases. In livescience. Retrieved July 1, 2014, from http://www.livescience.com/26496-endocrine-system.html