Medulla oblongata contains centre for heart beat, respiration, digestion, blood pressure, gut peristalsis, swallowing of food, secretion of glands and involuntary functions like vomiting, coughing, vasoconstrictor, vasodilator, sneezing, hic-couping. Cerebrum is a centre for intelligence, emotion, will power, memory, consciousness, imagination, experience, knowledge, reasoning, voluntary controls, weeping and laughing, micturition and defecation. Cerebellum is primary centre for balancing, equilibrium, orientation and co-ordination of muscular activities. Spinal cord provides pathway to sensory impulse towards brain and pathway to moter nerve impulse away from brain.