Nervous System

Main Parts

The human nervous system is broadly divided into:

1. Brain: The control center of the nervous system.
2. Spinal Cord: A long, thin, tubular bundle of nervous tissue.
3. Nerves: Bundles of nerve fibers that transmit signals throughout the body.

Brain

The brain is located inside the skull and is responsible for controlling thoughts, memory, emotions, touch, motor skills, vision, breathing, temperature, hunger, and every process that regulates our body.

• Cerebrum:
  • Location: The largest part of the brain, located in the upper front part of the skull.
  • Function: Responsible for voluntary actions, thought, memory, intelligence, language, and sensory perception (e.g., sight, hearing, touch).
• Cerebellum:
  • Location: Located at the back of the brain, below the cerebrum.
  • Function: Coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.
• Medulla Oblongata:
  • Location: The lowest part of the brainstem, connecting the brain to the spinal cord.
  • Function: Controls vital involuntary functions such as breathing, heart rate, blood pressure, swallowing, and digestion.

Spinal Cord

• Location: Extends from the medulla oblongata down through the vertebral column.
• Function: Serves as the main pathway for information to and from the brain. It also controls reflex actions.

Nerves

• What are Nerves: Nerves are bundles of nerve fibers (axons) that transmit electrical impulses (nerve signals) between the central nervous system and other parts of the body.
• General Function: To transmit information rapidly throughout the body, enabling communication between different organs and systems, and coordinating responses to stimuli.