The Wet Tropics
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This document summarizes the effects of the hot and humid environment of the Wet Tropics region of northeastern Australia on the human body. The high temperatures and humidity can cause profuse sweating, heat exhaustion, and heat stroke as the body tries to maintain homeostasis. Several dangerous and poisonous organisms also present risks. The nervous, circulatory, and muscular systems are all affected as the body works to regulate its temperature through dilated blood vessels and sweat, which can lead to heat cramps if electrolytes are not replaced. Proper precautions like loose light clothing, water, and insect repellent are recommended.
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Thermoregulation is the ability of an organism to keep its body temperature within certain
boundaries, even when the surrounding temperature is very different. This process is one aspect
of homeostasis: a dynamic state of stability between an animal\'s internal environment and its
external environment (the study of such processes in zoology has been called ecophysiology or
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°F) death is almost inevitable.[citation needed] Humans may also experience lethal hyperthermia
when the wet bulb temperature is sustained above 35 °C (95 °F) for six hours.[1][2] The opposite
condition, when body temperature decreases below normal levels, is known as hypothermia.
Whereas an organism that thermoregulates is one that keeps its core body temperature within
certain limits, a thermoconformer is subject to changes in body temperature according to changes
in the temperature outside of its body. It was not until the introduction of thermometers that any
exact data on the temperature of animals could be obtained. It was then found that local
differences were present, since heat production and heat loss vary considerably in different parts
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internal parts. Hence it is important to identify the parts of the body that most closely reflect the
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must be conducted under comparable conditions. The rectum has traditionally been considered to
reflect most accurately the temperature of internal parts, or in some cases of sex or species, the
vagina, uterus or bladder. Occasionally the temperature of the urine as it leaves the urethra may
be of use. More often the temperature is taken in the mouth, axilla, ear or groin.
As in other mammals, thermoregulation is an important aspect of human homeostasis. Most body
heat is generated in the deep organs, especially the liver, brain, and heart, and in contraction of
skeletal muscles. Humans have been able to adapt to a great diversity of climates, including hot
humid and hot arid. High temperatures pose serious stresses for the human body, placing it in
great danger of injury or even death. For humans, adaptation to varying climatic conditions
includes both physiological mechanisms as a byproduct of evolution, and the conscious
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3.Environmental Emergencies 1.ppeknrvlnwvlenvltx
lknwsvolwknolwwklavnkaenovnsoe;nvo;aeno;bniaeo;nboaen;oinorineonbeoinboenboasnerionobineln;boleno;inoeinbjrn;osnoibnso;n;ionto;u
Regulation of temperature of Human body
Homoeothermic (WARM blooded)- Humans capable of maintaining their body temperatures within narrow limits inspite of wide variations in environmental (ambient) temperature.
Poikilothermic- (Cold blooded) eg.-fish, reptiles
Neutral zone temperature/ Comfortable temperature/Critical / ambient temperature- at which there is no active heat loss and heat gain mechanism operated by body.
So it is the lowest ambient temperature at which mammals can maintain its body temperature at the basal metabolic rate.
Normally it is 27 ± 2º C
Living tissues can function optimally only within a very narrow range of temperature. Therefore accurate regulation of body temperature is a great boon: it enables the animal to be physically active all round the year, and in different geographical locations.
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humid and hot arid. High temperatures pose serious stresses for the human body, placing it in
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temperature is greater than that of the surroundings, the body can lose heat by radiation and
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