use of the term Bhagavan for teacher is repeated elsewhere, such as in the opening lines and verse 4.1 of the Prashna Upanishad, as well as in other Upanishads such as in verse 1.1.3 of the Mundaka Upanishad. Sage Pippalada opens the answers to the three questions by listing five gross elements, five senses and five organs of action as expression of deities. In verses 2.3 and 2.4, the Prashna Upanishad states that Prana (breath, spirit) is the most essential and powerful of all, because without it all other deities cannot survive in a creature, they exist only when Prana is present. The deities manifest their power because of and in honor of Prana. The spirit manifests itself in nature as well as life, as Agni (fire), as sun, as air, as space, as wind, as that which has form and as that which does not have form. What is the nature of man, and how is it so? - Third Prashna The third Prashna of the Upanishad asks six questions: (1) Whence is life born? (2) when born, how does it come into the body? (3) when it has entered the body, how does it abide? (4) how does it go out of the body? (5) how does life interface its relation with nature and senses? (6) how does life interface with Self? Sage Pippalada states that these questions are difficult, and given the student's past curiosities about Brahman, he explains it as follows, Life enters the body, states the Prashna Upanishad, by the act of mind. It governs the body by delegating work to other organs, sage Pippalada continues in verse 3.4, each specialized to do its own work independent of the other powers, just like a king commands his ministers to govern functions in the villages in his kingdom. The Upanishad then enumerates a theory of human body that is found in older Vedic literature, such as the Brihadaranyaka Upanishad hymn II.1.19. It asserts, for example, that human body has a heart as the principal organ of Self, from where arise 101 major arteries, each major artery divides into a hundred times, which in turn subdivide into 72,000 smaller arteries, giving a total of 727,210,201 small and large arteries, and that these arteries diffuse air throughout the body. It is this life-breath which interfaces Self to all organs and life in human body, states the Upanishad. The