1. THERMOREGULATION CONTROL OFBODY TEMPERATUREBy Ahmad FauzanE-mail: d.344.af@gmail.comLecturer and ResearcherNursing Basic Science Department Muhammadiyah Gombong University

2. CORE TEMPERATURE The core temperature of the human bodyis 37C The core of the human body includes theorgans of the thorax, abdomen and thehead This is where the vital organs are located Their enzyme systems must operate inoptimum conditions The periphery of the body can withstandsome deviation from the core temperature 3. HEAT LOSS AND HEAT GAINThe body must balance its heat budgetHeat is gained: by conduction from warm air surrounding the body by the bodys metabolic activity which generates heate.g. when muscle moveHeat is lost: by conduction and radiation to cold air (or water) by evaporation of sweat from the body surface(c.f. properties of water) Humans can also affect their body temperature bychanging their behavioure.g. wearing different clothes, seeking shade 4. MAINTAINING THE BODY TEMPERATUREKeeping warmStaying coolIncreasedIncrease blood flow toinsulation, subcutaneous skin, increases conductionfat reduces the conduction and radiation of heat fromof heat from the bodythe bodyReduced sweating Increased sweatdecreases evaporationsecretion, increases evaporationIncreased shivering, Reduced activityincreases heat produced bymuscle tissue 2 to 5 times 2008 Paul Billiet ODWS 5. Core bodytemperature>37CThermoreceptors Hypothalamus nervesMuscles ofSweat skin arterioleglands walls relax Muscles increaseSkin arteries dilate reducesecretionMore blood to the activity skin. More radiation & conduction of heat More water covers theskin.More evaporationLess heat generated 6. NEGATIVE Blood FEEDBACKtemperatureMuscles of skinThermoreceptorsarteriolewalls relax Core body Sweat Body nerves Returntemperature Thermoreceptors Hypothalamus glandsloses to 37C>37C increaseheatsecretionMusclesreduceactivity 7. Core bodytemperature