The human brain is the central organ of the nervous system that controls and coordinates all activities of the body. It is located inside the skull and is protected by the cranium and protective membranes called meninges. The brain receives information from the sense organs, processes it, and sends signals to different parts of the body through nerves. It is responsible for functions such as thinking, memory, emotions, movement, coordination, and regulation of body processes like breathing and heartbeat. The human brain is mainly divided into three major parts: cerebrum, cerebellum, and medulla oblongata. Each part performs specific functions related to body control and coordination.