Brahma started his work and created two kinds of creation, Chaitanya (animate) and Jad (inanimate). All living beings having desire, consciousness and ego fall under Chaitanya creation. This is an independent creation which is known as Pranmaya-kosh of the universe. Chaitanya (animate) element pervades the entire universe and is known as Pran. Ideas, will and emotions are three attributes of Pran-tatva which constitute the three coverings (bodies) of the soul astral (Sukshma), causal (Karan) and physical (Sthool). All living beings owe their consciousness and existence to this Pran-tatva.
