The human brain is a complex organ that controls all activities of the body. It is divided into three main parts:

• Forebrain: Includes the cerebrum, thalamus, and hypothalamus. Responsible for thinking, memory, emotions, and sensory processing.
• Midbrain: Acts as a relay center for sensory and motor signals. Controls eye movement and auditory/visual reflexes.
• Hindbrain: Includes cerebellum, pons, and medulla oblongata. Controls balance, posture, and involuntary actions like breathing and heartbeat.

Key Points to Know:

• Protected by skull and meninges.
• Contains billions of neurons connected via synapses.
• Cerebrum is the largest part and highly developed in humans.