The human brain is a complex organ, made up of several distinct parts, each responsible for different functions. The cerebrum, the largest part, is responsible for sensory interpretation, thought processing, and voluntary muscle activity. Beneath it is the cerebellum, which controls balance and coordination. The brainstem connects the brain to the spinal cord and oversees automatic processes like breathing and heart rate. The limbic system, containing structures like the hippocampus and amygdala, is vital for memory and emotion.