What are the largest and smallest parts of human brain?

The largest part of the human brain is the cerebrum, which consists of two hemispheres and occupies about two-thirds of the brain's weight and volume. The cerebrum is responsible for higher cognitive functions such as language, memory, reasoning, and consciousness.

The smallest part of the human brain is the cerebellum, which is located at the back of the brain and accounts for about 10% of its total weight. The cerebellum is responsible for coordinating muscle movements and maintaining balance.