The answer is no. The liver is a filter that filters out toxins from the blood but it does not produce body heat. Here is brief description of how the body produces heat by Dr. Swanson
http://www.madsci.org/posts/archives/1999-09/937368195.Gb.r.html
Liver is the major organ of metabolism. Large amount of energy is released during the metabolic activity. This heat is used to keep your body warm.
Humans produce heat in order to keep warm. This is done by the body using its caloric reserves such as glucose and glycogen to make energy for the integumentary system to burn and thus heat up the body. If the body doesn't do this, it could undergo hypothermia and freeze to death.
They produce their own heat just as you do but instead of a coat and sweater they have blubber under their skin to help keep them warm. Being in water draws heat away from the body.
it's pysical, since it does not produce heat itself, e.g: the human body produces heat, but your coat- (the insulater) though it helps you keep warm, the coat is not producing heat and is atually keeping body heat inside the insulation.
Endothermic animals rely on themselves to produce their own heat. Ectothermic animals, however, must rely on the sun to keep their body heat up.
Heavier humans have more body fat therefore produce heat to keep themselves warm.
The body keep a constant heat because f the blood running through the body. The body temperature does not change even if the temperatures of our surroundings change.
It depends on the type of clothes. Normal clothes won't really "heat" you up, but they can keep you warm by trapping in heat. Your body is constantly producing heat, so by wearing clothes, you trap your body heat in, thus keeping you, and your clothes warmer. On the other hand, if you had clothes that produce heat themselves, such as electric blankets do, than you could say that they would heat you up.
The body needs the liver survive because this is where toxins are excreted in the form of a bile. The liver has so many functions that is vital to human body. Keep in mind that the liver can be used as storage for blood until it is ready to be used.
The body produces heat mainly through metabolic processes as your body breaks down the food you eat and converts it into energy. Basically, glucose (sugar) from food, reacts with the oxygen you breathe to produce carbon dioxide, water, and energy. Some of this energy is stored in a chemical called ATP (adenosine triphosphate) to be used later in cell processes, and some of it is released as heat. This is called cellular respiration and it is the main way your body stays warm. Your body under normal conditions regulates the amount of heat produced to keep a stable body temperature of 37 degrees Celsius or 98 degrees Fahrenheit.
why do human need heat to survive
Skin provides a waterproof barrier that maintains the body's moisture. It also provides insulation that helps keep body heat in the body.