How does the skin assist in temperature control?
969853
When you sweat your body is trying to cool itself and the sweat creates moisture to cool the skin the blood vessels underneath the skin dialate and release the heat in the blood that then makes your body sweat. When you are cold the blood vessels contrict holding the heat in. and when your hairs stand up that is from the tiny muscles attached conracting, pulling inward helping so heat cant escape, that why you get goosebumps too!
670450
Your body has mechanisms for cooling itself to regulate the internal temperature -- evaporation of sweat from your skin helps cool the body.\n\nIf your body temperature is unable to regulate itself, you end up with a heat injury -- either heat exhaustion or heat stroke.  Heat stroke can kill you.
23844
A very good question -- in my experience the key to good control is placement and mass of the temperature sensor.\n\nYou can use a thermocouple or an RTD (resistance temperature device) depending on your temperature range.\n\nBut in most factory process controls the biggest problem is how to make sure that the sensor is measuring the ambient temperature, or the temperature of the object being heated. If any radiant heat energy falls on the sensor, you will get meaningless temperature readings.\n\nIn some cases a simple reflective shield will allow the sensor to measure the ambient temperature.\n\nSometimes the sensor is embedded in either the object or in a dummy object with similar characteristics. After all your goal is to control the RIGHT temperature, not just any temperature.\n\nThe sources below give a typical easy to use PID controller and a high power SSR.\n\nThe controller has an autotune function -- this is very key because tuning a PID controller can be very frustrating. You can end up with wildly cycling kooky results unless you are experienced.\n\nRemember that a Proportional Integrating Controller is a big step up from a bang-bang on off relay type controller. \n\nProportional just means that it can send a small milliamp signal to the Solid State Relay allowing it to proportionally adjust the heat output of your resistance heaters.\n\nIntegrating can be interpreted to mean that the PID takes into account the amount of heat you have already pumped into the system. So it can avoid shooting a big pulse of heat into an oven which it already knows is pretty fired up already.\n\nAnd Derivative means it watches the rise or fall of the temperature curve to prevent overshooting and undershooting. This keeps the temperature from varying wildly. Maybe! Depends on if you know how to tune it.\n\nGive these folks a phone call, they offer free application consulting, even for small projects.
1007111
Water distributes heat much faster than air can, thus, if your are warmer, it will absorb your body heat.
81918
The largest organ on the human body is skin. One of the most important jobs of skin is to rid our system of toxins which it does everytime you sweat. Sweating is vital to remaining healthy and most people do not do enough sweating in todays soft life to rid their systems of these toxins. Sauna's and steam rooms are a way to increase the amount of sweating. However I never spend more than 20-45 mins in one at a time, as you can overheat and pass out.
563473
Homeostasis \nHomeostasis is the physiological process by which the internal systems of the body (e.g. blood pressure, body temperature, acid-base balance) are maintained at equilibrium despite variations in the external conditions. \nThe body can maintain the fluid levels using the kidneys, these organs filter out harmful chemicals and excess liquid into the bladder from which the urine is then expelled.  Body temperature is regulated somewhat by the skin, example, if you are hot you begin to sweat and this helps to cool the body, if you are cold you shiver this helps to raise, the body temperature.
279812
To keep it simple, temperature doesn't travel only heat travels. It does so by conduction, convection or radiation.
556811
Thermometer Measures the Actual temperature, by the implementation of a device or mercury's reaction to the degrees.\n\nWind chill is a FACTOR- as it blows across our skin, the temperature is PERCIEVED to be colder, as our skin is being Cooled faster- the wind blows our body warmth away.\n\nWind chill factor is Calculated, Not Measured.
524471
Warm-blooded animals maintain thermal homeostasis; that is, they keep their core body temperature at a nearly constant level regardless of the temperature of the surrounding environment. This can involve not only the ability to generate heat, but also the ability to cool down. Warm-blooded animals control their body temperature by regulating their metabolic rates (e.g. increasing their metabolic rate as the surrounding temperature begins to decrease).\n\nBoth the terms "warm-blooded" and "cold-blooded" have fallen out of favor with scientists, because of the generality of the terms, and due to an increased understanding in this field. Body temperature types do not fall into simple either/or categories. Each term may be replaced with one or more variants (see: breaking down warm-bloodedness). Body temperature maintenance incorporates a wide range of different techniques that result in a body temperature continuum, with the traditional ideals of warm-blooded and cold-blooded being at opposite ends of the spectrum.\n\nBreaking down warm-bloodedness\nWarm-bloodedness generally refers to three separate aspects of thermoregulation.\n\nEndothermy is the ability of some creatures to control their body temperatures through internal means such as muscle shivering, fat burning, and panting (Greek: endo = "within," therm = "heat"). \nHomeothermy is the kind of thermoregulation used by those creatures that maintain a stable internal body temperature regardless of external influence. This temperature is often higher than the immediate environment (Greek: homoios = "same, identical," therm = "heat"). \nTachymetabolism is the kind of thermoregulation used by creatures that maintain a high resting metabolism (Greek: tachy = "fast, swift," metabol = "to change"). Tachymetabolic creatures are, essentially, "on" all the time. Though their resting metabolism is still many times slower than their active metabolism, the difference is often not as large as that seen in bradymetabolic creatures. Tachymetabolic creatures have a harder time dealing with a scarcity of food.
644689
THe ep[idermis is a layer of dead skincells, that primarily acts as a protective barrier against bacteria and viruses, aqueous solutions and water, etc. The dermis is the living part of the skin, and functions as a barrier, to modulate water and heat balance in the body and secretes substances to control viral, bacteria, and fungal growth- in addition, it is a critical component of the vitamin D synthesis system.  It regulates heat and cold using evaporative cooling of sweat, piloerection of hairs, increased or decreased blood flow to the surface of the skin, etc.  It is the largest organ by weight of the body.
153489
The sun is radiating heat which is absorbed by your body and clothes.  The body tries to maintain a consistent internal temperature of around 98.6 degrees.  As your body and clothes absorb heat energy from the sun, your body will attempt to compensate for this additional heat by causing your skin to perspire.  As the perspiration evaporates off of your skin, it carries away some of the heat from your body, thus lowering your body temperature.
479744
You don't, it just doesn't evaporate like it would in non-humid conditions.  Its all about the movement of water, and if the air is already very dense with water particles (ie. humidity) then the liquid on your skin is less inclined to enter the air.  But in very dry conditions, the water on your skin evaporates quickly and this cools you down.
472365
you mean like the fact that it sweats when you are hot to cool the body? it is your body's largest organ, and it sheilds the rest of the body from dirt and disease by providing a barrier between them and germs.
1054158
I think the key words in your question are "at room temperature".  See, room temperature is less than body temperature.  Heat energy wants to go from a higher temp region to a lower temp region.  But, water absorbs heat energy at a faster rate than air.  So, the cooling feeling (or transfer of heat away from your body into the surrounding medium) is greater in water than in air.  Now, turn on a fan and have more air, thus more cooling medium moving over you taking heat away and it will feel cooler even inf the air is at the same room temperature.
498181
We generate heat through metabolic work, even when not physically working.  \nTo avoid increasing body temperature we need to dispose of this heat.  \nThis is clearly easier when the surrounds are cooler than the body. \nIt is still  possible even when surrounding temperature is above 98deg, as long as humidity is not so high as to prevent evaporation.
238021
touch pads usually sense the heat from your body. since the pencil isn't as warm as body temperature, it doesn't work. \ntry using your toes.
949363
Depends of if the body temperature is the same as the surrounding, for example a snake that has been sunbathing for a few hours before dark will remain warmer than its surroundings for some time, so thermal immagery devices could have limited use. I'd say a flashlight or headlamp would probably be just as much use in most cases tough.