The temp of human body is 98.4 F (36.67 C). Why do we feel hot even at the room temp (28-35 C)?

Question

According to the law of thermodyanamics heat energy always flows from hotter body to cooler body. So we feel cold at the normal temp. In biology we read that the temp is maintained constant at all parts of the body due to oxidation. So Please give detialed answer (dont give simple answers Please)

Answer 1

The INTERNAL temperature of the human body is maintained at 36.67 C. As someone rightly mentioned, you need to look at this from a physiological point of view.
We feel temperature purely because of the temperature receptors on our skin and NOT due to internal body temperature, atleast not to a noticeable extent.
All temperatures above ~30C are interpreted as being 'hot' while those below are interpreted as 'cold'. We feel no temperature at 30C.
Now, the reason we feel hot at lower temperature is due to other factors like humidity, wind and others. These factors, alongwith temperature, determine whether we feel hot or cold.
I have explained this the best way I could.

Hope this helps.
Cheers!

Answer 2

Our CORE temp of 98.6 is on avg. Some people run cooler some hotter. The body can only adjust this temp by 1 -3 degrees during normal activity. Our body cannot adjust this temp instantly so leaving a cool environment into a warm one our body is continuing to increase the core temp and it takes about 15-30 minutes before the body can adjust to the new temp (by that time we are already uncomfortable). Our skin plays a role in this as well because it is super sensitive to temp changes and the brain attempts to compensate for the temp change but the body can't move fast enough to keep up with the drastic change. If you slowly increased the temp around you (such as the time it takes for the AC to turn back on) your body is constantly adjusting but the temp change is slow enough so we don't feel uncomfortable during this AC cycle.

Answer 3

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RE:
The temp of human body is 98.4 F (36.67 C). Why do we feel hot even at the room temp (28-35 C)?
According to the law of thermodyanamics heat energy always flows from hotter body to cooler body. So we feel cold at the normal temp. In biology we read that the temp is maintained constant at all parts of the body due to oxidation. So Please give detialed answer (dont give simple answers Please)

Answer 4

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Smoe people wrote that it was because we wore clothes or stood in the sun--as though all you had to do to be comfortable in 98-degree heat was walk around naked or sit in the shade. Clearly what we have here is a failure to grasp the scientific essence of the thing, namely, that the air temperature has to be lower than body temperature if you're to cool yourself efficiently. Your body is a little fuel-burning engine, and like all engines generates waste heat. That heat has to go somewhere, lest you pop a gasket. The easiest place to put it is someplace cooler, such as the air around you. However, if the ambient air temperature is the same as your body temperature, you have to go to great lengths to shove the waste heat out into it, e.g., sweating like a pig or going out to K mart to buy an air conditioner. What we want, therefore, is an ambient temperature that lets us dump waste heat with the least strain. From experience we know this temperature is 68 to 72 degrees F. If you're very lightly dressed you may prefer 80. But even if you're starkers there's no way you'll be happy when it's 98 in the shade.

Answer 5

Homeostasis is the physiological process that maintains all processes in the body, including temperature at an equilibrium. Some of the feed back mechanisms used by the body for this are: sense of hunger, thirst, and heat.

As you rightly said heat flows from hotter to colder regions.

But, how much will flow?

In still air a surface loses about 10 Kcal/sq.mtr/hour./deg C temp difference between the surface and surroundings.

An adult human has a body surface area of about two sq.mtr.
This translates to a heat loss of 240 Kcals/hour if the person is bare, and standing.

Since most of the body is (usually) covered, this heat loss is drastically reduced. An adult has to lose about 120 kcal/hour for the metabolic heat to be released to the surroundings to maintain the average body temperature.

This is why in cold surroundings one puts on more clothes , cover the head and hands to minimize losses while in the tropics loose cotton clothes, sandals on the feet and such are used.

Fans or wind increase the heat transfer coefficient. This is the origin of the wind chill factor.

Answer 6

The official figure you gave is the average body's core temperature. Your skin is cooler than that, and cools even more the further you get from the torso.
The body permanently produces heat, just as you say. This way we can keep warm at lower air temperatures. We feel cold, which is our body's way of saying that we please seek a warmer spot as the extra heating uses up precious energy. At about 20-22°C for an average caucasian, the need to give off heat and the surrounding temperature are balanced, so we feel neither hot nor cold. At higher temperatures, we need to sweat to give off excess heat, and we feel hot.

Answer 7

Interesting observation !
The sensation of warmth and cold are a relative feeling for us.
Factors like humidity, wind are as important as the sUrrounding temperature.

Try this - Keep your hand in the freezer for 5 seconds and then put ur hand in tap water. It will feel lot warmer.

The laws of thermodynamics are maintained but only the perception is different. Its an in built mechanism to avoid injury to our body.

Answer 8

Dear Mr Rao,
You need to think like a Biologist, not like a Physicist. Mammals generate their own heat. They are most comfortable at the temperature that they evolved to live in which is probably nearer 25 C for most but African pygmies might feel more comfortable at 35 C while Eskimos might like 10 C.

Answer 9

what you feel is not always the same as temperature- If you had frostbite, you couldnt feel scalding hot water. The body gives excess heat.

Answer 10

becose skin is always cooler than ineer body becose of more than 64 reasons as a physiological homeostasis .