Homonym: brains (Intelligence)
The brain is a complex organ located in the head of humans and many animals. It is part of the central nervous system and is responsible for processing information, controlling movements, and regulating bodily functions. The brain consists of various regions, each with specific roles, such as the cerebrum for thinking and decision-making, and the cerebellum for coordination and balance.
The brain is made up of billions of cells called neurons, which communicate through electrical and chemical signals. It also requires oxygen and nutrients to function properly, supplied by the blood through a network of vessels. Understanding the brain is crucial for fields like medicine and psychology.