B.
Special proteins are in charge of regulating the movement of substance through the double-membrane.
Answer:
The CNS
Explanation:
First, the entire CNS is enclosed in bone. The brain is protected by the skull, while the spinal cord is protected by the vertebra of the spinal column. The brain and spinal cord are both covered with a protective tissue known as meninges.
Answer:
Saudi Arabia is your answer ...
Explanation:
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