Life force

life force is the energy make organism alive, distinguishable from nonliving matter. Different culture has different explaination about this force. Animated matter is not necessary possessed with life force, monsters such as zombei, they can move; howecer, they are not alive, they need to gain life force from organism, so they attack organism to eat fresh and drink blood.

related terms

 * soul:  nonliving matter with soul will be animated ; howecer, they are not alive, they need to gain life force from organism

explaination of life force in different culture

 * China: Chinese believes that life force can be classified into two catagories: yin and yang, blood(血) is a kind of yin energy; yang energy, for example, qi(氣) .