Special Nerves in the body called thermoreceptors measure internal and external temperatures.
How our body maintains a constant temperature. Temperature receptors in the skin detect changes in the external temperature. They pass this information to the processing centre in the brain, called the hypothalamus. The processing centre also has temperature receptors to detect changes in the temperature of the blood. The body is very good at keeping its temperature within a safe range, even when temperatures outside the body change a lot. 1  When you are too hot, the blood vessels in your skin widen to carry the excess heat to your skin's surface. 2  When you are too cold, your blood vessels narrow. Results. Body temperature is a measure of the body's ability to generate and get rid of heat. When you tell your doctor about your temperature measurement, be sure to mention whether it was taken on the forehead or in the mouth, rectum, armpit, or ear. The body is very good at keeping its temperature within a narrow, safe range in spite of large variations in temperatures outside the body. When you are too hot, the blood vessels in your skin expand (dilate) to carry the excess heat to your skin's surface. Special Nerves in the body called thermoreceptors measure internal and external temperatures. When they detect any changes, they send messages to the hypothalamus gland in the barin to raise/lower the temperature of the blood. Body temperature is a measure of the body's ability to generate and get rid of heat. The body is very good at keeping its temperature within a narrow, safe range in spite of large variations in temperatures outside the body. Special Nerves in the body called thermoreceptors measure internal and external temperatures. When they detect any changes, they send messages to the hypothalamus gland in the … barin to raise/lower the temperature of the blood. The hypothalamus is the processing centre in the brain that controls body temperature. It does this by triggering changes to effectors, such as sweat glands and muscles controlling body hair. Heat stroke can happen when the body becomes too hot; and hypothermia when the body becomes too cold.
http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/bodytemprev1.shtml http://www.healthlinkbc.ca/healthtopics/content.asp?hwid=hw198785 http://www.emedicinehealth.com/script/main/art.asp?articlekey=128929 http://www.webmd.com/first-aid/body-temperature http://www.answers.com/Q/How_does_the_body_detect_changes_in_blood_temperature http://www.emedicinehealth.com/script/main/art.asp?articlekey=128929 http://www.answers.com/Q/How_does_the_body_detect_a_rise_in_temperature http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/bodytemprev1.shtml
how does the body detect outside temperature