Question
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What are the main parts of the nervous system?

Verified Answer

The nervous system is mainly divided into two major parts: the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). Together, these systems control body functions, communication, movement, sensations, and responses to the environment.

1. Central Nervous System (CNS)

The Central Nervous System is the main control center of the body. It consists of:

  • Brain

  • Spinal cord

Functions of the CNS:

  • Processes information received from the body

  • Controls thinking, memory, emotions, and learning

  • Coordinates body movements and reflexes

  • Sends instructions to muscles and organs

The brain acts as the command center, while the spinal cord carries messages between the brain and the rest of the body.

2. Peripheral Nervous System (PNS)

The Peripheral Nervous System includes all the nerves outside the brain and spinal cord. These nerves connect the CNS to different body parts.

Functions of the PNS:

  • Carries sensory information to the brain and spinal cord

  • Sends motor commands from the CNS to muscles and glands

  • Helps the body respond to external stimuli

The PNS is further divided into:

  • Somatic nervous system – controls voluntary actions

  • Autonomic nervous system – controls involuntary actions like heartbeat and digestion

The autonomic nervous system is further divided into:

  • Sympathetic nervous system

  • Parasympathetic nervous system

Together, the CNS and PNS help maintain coordination, communication, and proper functioning of the entire body.