explain how heating system works and why we use heating systems, use the human body as an example?
549989
Any heating system works on a simple system:\n\n1. A heat source ('boiler') heats a circulating fluid;\n2. The fluid is pumped around the system heating other 'areas'\n3. The slightly cooler fluid is circulated back to the 'boiler' where it is reheated - by doing this we do not have to introduce additional fluid and it is more efficient to reheat already 'heated' fluid.\n\nHope this helps but if you need more drop me a note.
667354
The Cardiovascular System\n\n\n The cardiovascular system and the lymphatic system form what is collectively called the circulatory system. Together, these systems transport oxygen, nutrients, cell wastes, hormones, and many other substances to and from all cells in the body. The trillions of cells in the human body take up nutrients and excrete wastes every minute of every day. Although the pace of this exchange may increase with activity or slow with rest, it happens continuously. If it stops, so does life. Of the two systems, the cardiovascular system is the primary transport operator; the lymphatic system aids it in its function.\n\n\nDesign: Parts of the Cardiovascular System\n\nCardiovascular comes from the Greek word cardia, meaning "heart," and the Latin vasculum, meaning "small vessel." The basic components of the cardiovascular system are the heart, the blood vessels, and the blood. The system can be compared to a large muscular pump (the heart) that sends a fluid (blood) through a series of large and small tubes (blood vessels). As blood circulates through the increasingly intricate system of vessels, it picks up oxygen from the lungs, nutrients from the small intestine, and .....
906611
breathe into your hands. your breath warms your hands and in turn you begin breathing warm air. breathing warm air triggers the bodies machinary to beginning heating up  the body parts. of course this is only a quick fix and trick. you need to get to cover or clothing immeadiately.
952889
live human is "hot" because of all the 4 processes needed for the body to be alive.\nthe process generate heat as a by product of the reactions occurring .\n\nWhen animals are dead there are no more metabolic reactions to generate the heat so the temperature decreases.
777046
physics of the human body
728515
the circulatory system (ie the blood circulatory system) can maintain the temperature of the body by vaso-dilation and vaso constriction of the blood vessels ( both deepseated and superficial) when there is cold or the weather is hot respectively.
815926
That is actually an interesting question.  Scientists have shown that shivering is actually a very effective means to move the body around, which in turn is a good way to generate some heat quickly.  Going for a run would do the same, but the brain sends a signal to shiver just to get your body heat up.  \n\nYou also may shiver when you are sick.  Fever is one of the body's defense mechanisms.  (It helps kill germs, although it is dangerous when it gets too high.)  So you run a fever, and one way to heat up is to send the word to shiver.\n\nGood luck!!
472455
Heat transfer can occur through convection (ex: In the winter, the wind makes you colder), conduction (ex: heating a pot of water on an electric stove), and radiation (ex: sunlight warming the earth).
666983
the normal temperature from the human body depends where the person lives , in the hot weather or in the cold weather, but the regular temperature is 36 or 37 degrees Celsius
980721
Heat is generated through inefficient energy reactions in our body.\n\nAs you may remember from physics class, no reaction is 100% efficient - for example: In a light bulb, not all of the electrical energy in converted into light; some is converted into heat.\n\nThe same is true of our cells, and a some of our energy is released as heat (instead of what is intended!) Muscle movement is especially inefficient, with a great deal of the energy used for muscle cell contraction given off as heat. This is why you get hot when you do exercise!!
761748
I'll answer a few of these to get you started.\n\n1.) Heat is only one type of energy. If, for example, you just heat something up or cool it down, then there is just a change in heat. But if there is a reaction, then there is a change of energy without a change of heat.\n\n3.) Enthalpy is defined as the thermodynamic potential of a system, which means that it's a function of heat, pressure, and volume, not just heat.\n\n4.) Standard conditions: Usually Standard Temperature and Pressure, meaning 0C and 100 kPa.\n\n7.) Q = energy added by heat. W = work. Thus, the internal energy of a system is dependant on both the heat and the work done on a system. For example, you could heat a gas, or you could simply compress it (lowering volume, increasing pressure) - both of which would increase the internal energy of the system.\n\n8.) Related to 7: Changing the pressure and volume of a gas will do work upon it.\n\n9.) Work is a form of energy - it's the actual mechanical work that can be achieved when energy is expended. In an ideal system, energy is not lost, but in a real system, there are inefficiencies where energy is not completely converted to work, so while you may extract, say 100 J of energy, it might only do 90 J of work.
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.
25048
It's a natural muscle reaction to build up warmth, because otherwise we'd get colder and colder and die of hyperthermia, and no body is going to let that happen to itself except in extreme conditions like being lost in a snowstorm when even shivering isn't enough to save itself, no matter how hard it tries.
125707
The radiator in your car is a heat exchanger. It removes heat from your engine and puts it in the atmosphere.\n\nThe condenser in an air conditioner exchanges heat between the atomsphere and the refrigerant in the system. The evaporator coil in your AC exchanges heat between the refrigerant and the air in the house, car or what every is being cooled.\n\nIn a refinery or chemical plant you will find reboilers (they heat the fluid in a distillation column), overhead condensers (they cool the vapors coming off of a distillation column), feed preheaters that warm the fluid going to a distillation column.\n\nIn a steam power plant, you have steam condensers that condense the steam from the exhaust of steam turbines, boiler feed preheaters, combustion air preheaters. In a power plant that uses gas turbines there are waste heat recovery units that extract heat from the gas turbine exaust.
31165
* Cardiovascular system: blood circulations with heart and blood vessels\n    * Digestive system: processing food with mouth, stomach and intestines\n    * Endocrine system: communicating within the body using hormones\n    * Immune system: defending against disease-causing agents\n    * Integumentary system: skin, hair and nails\n    * Lymphatic system: structures involved in the transfer of lymph between tissues and the bloodstream\n    * Muscular system: moving the body\n    * Nervous system: collecting, transferring and processing information with brain and nerves\n    * Reproductive system: the sex organs\n    * Respiratory system: the organs used for breathing, the lungs\n    * Skeletal system: structural support and protection through bones\n    * Urinary system: the kidneys and associated structures involved in the production and excretion of urine
329395
Well, first, you have to be specific about what energy.\n\nIf you are standing in a room where your body tempature is greater than the surrounding air, then you are radiating heat, which the naked eye cannot see. However, you can transfer this energy: for example, in the cold, a herd of animals will draw in close and rub against each other to share body heat and reduce exposure to the elements.\n\nThe human body does not emit light, however it does reflect it (otherwise you couldn't see someone). Your eye, obviously, can see light reflected from objects. You cannot transfer light to someone else, in the sense you're probably thinking of.
413743
It's indicated for hypothermic patients.  It works by generating heat that is absorbed by the body to help bring the core body temperature back to normal.  I think that's what you're asking.