 Prana is known by Eastern traditions as life force energy. When prana is flowing harmoniously, a person is in balance with themselves and divine intelligence. According to the wisdom teachings, there are five types of prana. First, you have prana itself, the source of the other four, which comes into the body from the Godhead through the top of the head and face. It's also a source of divine inspiration and forward momentum. Next is viana, the prana of the heart and body energy, responsible for the energy that you exert when you use your muscles and is responsible for the general circulation of your blood and functioning of your body systems. Udana is the upwards moving prana that lifts one's body of consciousness higher as one practices selflessness and drops us down into heavy karma when we are selfish. Samana is the energy of digestion. Whether you're digesting food or new ideas, Samana helps transform that energy into something usable by your body of consciousness. Finally, apana is the downwards flowing prana of excretion, also governing reproduction and sexual energy.