Brain is the most remarkable and complex part of our body. In adults it has approximately hundred billion neurons each connected to five hundred synapses. It has the ability to discriminate signals coming from visual, auditory or somatosensory pathways. It is responsible for giving people the capacity for art, languages and moral judgements. The brain nerve cells are neurons which make up the “Grey Matter”. The neurons transmit and gather electrochemical signals that are communicated via a network of millions of nerve fibres called dendrites and axons. These are the brain’s “white matter”. The cerebrum is the largest part of the brain accounting for the 85 percent of the organ weight. The distinctive, deeply wrinkled outer surface is the cerebral cortex which constitute of grey matter. Beneath this lies the white matter. Cerebrum is packed to its capacity inside our skull to various folds thereby maximizing the cortex area. It has four main regions frontal regions, temporal regions, parietal regions and occipital region. The second largest part is the cerebellum which lies beneath the cerebrum and is responsible for maintaining balance and movement. The brain stem at the organ’s base controls reflexes and crucial, controls basic functions such as heart beat, breathing and blood pressure. It also regulates when you feel sleepy or awake. The brain is extremely delicate and sensitive and requires maximum protection. It is surrounded my tough membranes called meninges. The space between these layers is filled with fluid. SHWETA