The cerebrum is the largest part of the brain, responsible for various functions such as thinking, memory, and voluntary movement. It is divided into two hemispheres, the left and right, which control opposite sides of the body. Each hemisphere is further divided into four lobes: the frontal, parietal, temporal, and occipital lobes, each associated with different functions like decision-making, sensory processing, and vision. The cerebrum is covered by a layer called the cerebral cortex, which is involved in higher brain functions. Beneath the cortex, there are structures like the hippocampus, important for memory, and the amygdala, which plays a role in emotions. Overall, the cerebrum is essential for complex behaviors and cognitive abilities.