Page 238 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Temperature zones of the body C. Environmental temperature and
temperature control

Environmental °C Thermo-
temperature regulation
Core 600
temperature
400
37°C Lunar
day
36°C 200
34°C Behavioral
32°C 80 adaptation
only
31°C
28°C 60 Thermoregulation
20°C Room temperature 35°C Tropics 40 Core temp- Sweating
(After Aschoff) erature
B. Arteriovenous exchange of heat 20 Thermoneutral
0 Shivering, etc.
Artery Vein Arctic/Antarctic
37 36 37 36.5 region
Exchange Plate 9.2
Behavioral
of heat –100 adaptation
35 34 36.5 34 Lunar only
Narrowed Widened night –200
vessel vessel
33 32 36 35.5 –273
Absolute
32 31 35. 35 zero
31 Capillaries 35
low Blood flow high
(After Hardy)
D. Neural factors affecting thermoregulation
Central Peripheral
thermosensors thermosensors
Hypothalamus

Sympathetic nervous system Somatic nervous system
cholinergic α 1 -adrenergic β 3 -adrenergic cholinergic

Blood Brown fat Skeletal
Sweat
glands vessels muscle
Heat loss Non-shivering Heat production
by evaporation Internal flow of heat thermogenesis by shivering 225
(core skin) (in infants)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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