Apana prana - apana a m. (opposed to {prANa}) , that of the five vital airs which goes downwards and out at the anus the anus. (in this sense also ({am}) n. L.) ; N. of a Saman ventris crepitus Apana controls from the solar plexus to the soles of the feet; it concerns the organs of elimination, of rejection and of birth, thus having [330] special relation to the organs of generation and of elimination. http://laluni.helloyou.ws/netnews/bk/patanjali/patanjali-bk3-39.html