2.83 central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves

• The main parts of the nervous system are the brain and the spinal cord.
• The spinal cord is linked to sense organ by nerves due to the central nervous system.
• The sense organs are our receptors and they sent messages to the central nervous system.
• Telling the central nervous system what's happening.
• These messages are sent along the sensory neurones.

receptor and  then central nerve system and then muscle