This fact sheet is a basic introduction to the human brain. It can help you understand how the healthy brain works, how to keep your brain healthy, and what happens when the brain doesn't work like it should.

brain, the mass of nerve tissue in the anterior end of an organism. The brain integrates sensory information and directs motor responses; in higher vertebrates it is also the centre of learning. The human brain weighs approximately 1.4 kg (3 pounds) and is made up of billions of cells called neurons.

Learn about your brain, an essential organ that controls many body functions and processes information. Find out how your brain is structured, what lobes and hemispheres do, and what conditions can affect your brain health.

Learn about the structure, functions, and disorders of the human brain, the most complex organ in the universe. Discover how the brain protects itself, processes information, and affects our behavior and emotions.

Learn about the four major regions of the brain: the cerebrum, diencephalon, cerebellum, and brainstem. Explore their functions, structures, and connections with 3D models and interactive diagrams.

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.

Learn about the anatomy and functions of the human brain, its main parts, lobes, hemispheres, and glands. Find out how the brain processes sensory information, regulates bodily functions, forms thoughts and emotions, and stores memories.

The human brain has about 1,000 times more neurons than the mouse brain, for instance, and 13.5 times more than the macaque 1.. But brain size and neuron number aren’t everything; some animals ...

The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles.