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What constitutes the central and peripheral nervous systems? How are the components of central nervous system protected?
 
a. The brain and spinal cord make up the -
b. The peripheral nervous system is made up of -  
c. The brain is protected by -
d. For protection, the spinal cord is contained in the -
e. Cerebrospinal fluid -
Answer variants:
Nerves that are not connected to the spinal cord
Central nervous system
Vertebral column
Skull
Cover the brain and spinal cord from mechanical shocks