The brain is the most complex organ in the body, made up of more than 100 billion nerve cells (neurons) and trillions of supportive cells (glia). ¹⁾

The brain is responsible for all of the body's functions, including movement, sensation, thought, and memory. ²⁾

The brain is divided into three main parts: the cerebrum, cerebellum, and brainstem. ³⁾

The cerebrum is the largest part of the brain and is responsible for conscious thought, memory, and emotion. ⁴⁾

The cerebellum is located beneath the cerebrum and is responsible for coordinating movement and balance. ⁵⁾

The brainstem connects the brain to the spinal cord and controls essential functions such as breathing, heartbeat, and blood pressure. ⁶⁾

The brain is protected by the skull, which surrounds it, and three meninges, which are layers of protective tissue that cover the brain and spinal cord. ⁷⁾

The brain is made up of about 60% fat, which helps to insulate the neurons and support their function. ⁸⁾

The brain is the most energy-intensive organ in the body, using about 20% of the body's total energy. ⁹⁾

The brain is able to rewire and adapt itself, a process called neuroplasticity. ¹⁰⁾

The brain contains a specialized region called the hippocampus, which is essential for forming new memories. ¹¹⁾

The brain's prefrontal cortex, located at the front of the brain, is responsible for decision-making, problem-solving, and controlling impulses. ¹²⁾

The brain's amygdala, located deep within the temporal lobes, is responsible for processing emotions such as fear and aggression. ¹³⁾

The brain's hypothalamus controls the body's homeostasis and regulates many of the body's automatic functions, including body temperature, hunger, thirst, and fatigue. ¹⁴⁾

The brain's occipital lobes located at the back of the brain are responsible for processing visual information from the eyes. ¹⁵⁾