Thermoregulation control of body temperature

8,995 views
8,171 views

Published on

0 Comments
6 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
8,995
On SlideShare
0
From Embeds
0
Number of Embeds
47
Actions
Shares
0
Downloads
331
Comments
0
Likes
6
Embeds 0
No embeds

No notes for slide

Thermoregulation control of body temperature

  1. 1. THERMOREGULATION CONTROL OF BODY TEMPERATURE By Ahmad Fauzan E-mail: d.344.af@gmail.com Lecturer and Researcher Nursing Basic Science Department Muhammadiyah Gombong University
  2. 2. CORE TEMPERATURE The core temperature of the human body is 37°C The core of the human body includes the organs of the thorax, abdomen and the head This is where the vital organs are located Their enzyme systems must operate in optimum conditions The periphery of the body can withstand some deviation from the core temperature
  3. 3. HEAT LOSS AND HEAT GAINThe body must balance its heat budgetHeat is gained: by conduction from warm air surrounding the body by the body’s metabolic activity which generates heat e.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 by changing their behaviour e.g. wearing different clothes, seeking shade
  4. 4. MAINTAINING THE BODY TEMPERATURE Keeping warm Staying coolIncreased Increase blood flow toinsulation, subcutaneous skin, increases conductionfat reduces the conduction and radiation of heat fromof heat from the body the bodyReduced sweating Increased sweatdecreases evaporation secretion, increases evaporationIncreased shivering, Reduced activityincreases heat produced bymuscle tissue 2 to 5 times © 2008 Paul Billiet ODWS
  5. 5. Core bodytemperature >37°C Thermoreceptors Hypothalamus nerves Muscles of Sweat skin arteriole glands walls relax Muscles increase Skin arteries dilate reduce secretion More blood to the activity skin. More radiation & conduction of heat More water covers the skin. More evaporation Less heat generated
  6. 6. NEGATIVE Blood FEEDBACK temperature Muscles of skin Thermoreceptors arteriole walls relax Core body Sweat Body nerves Returntemperature Thermoreceptors Hypothalamus glands loses to 37°C >37°C increase heat secretion Muscles reduce activity
  7. 7. Core bodytemperature <37°C Thermoreceptors Hypothalamus nerves Muscles of nerves Sweat skin arteriole glands walls Muscles constrict Skin arteries decrease constrict shivering secretion Less blood to the skin. Less radiation & conduction of heat Less water covers the skin. Less evaporation More heat generated
  8. 8. NEGATIVE Blood FEEDBACK temperature Muscles of skin arteriole Thermoreceptors walls constrict Body nerves loses Core body Sweat less Returntemperature Thermoreceptors Hypothalamus glands heat to 37°C <37°C decrease secretion Body Muscles gains nerves shivering heat
  9. 9. TEMPERATURE HOMEOSTASIS IN HUMANS

×