The brain is the powerhouse of the body & is the most complex organ. It uses 20% of the total oxygen we breath inn. The brain can be divided into 4 lobes: Temporal, Parietal, Occipital and Frontal. The brain makes up around 2% of a humans entire weight. The brain plays a central role in the central of most bodily functions including awareness, movements, sensation, thoughts, speech & memory, voluntary actions.