Id was the name given to the venerable of these tangible domains. In this domain we find that everything has been inherited, everything that was present at birth. Due to the world we find ourselves in, a segment of the id has developed to provide organs. These organs are able to receive stimuli and function as protection, through some adaptation, to act as a mediator between the id and the world. This segment or mediator, has been known as the ego. The ego is then able to satisfy the needs between the id in relation to reality.