Question

brain and spinal cord are two vital organs of our body how is our body designed to protect them

Answer 1

rain and spinal cord is necessary for the proper functioning of humans and animals.Brain is protected by the Cranium(skull)and it is surrounded with a fluidly substance which helps in the absorption of damage and spinal cord is protected by the vertebral column or the backbone.
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Answer 2

Our body is designed in such a way that the brain sits inside a bony box , the skull and inside , the gaps are filled with a fluid called CSF ( Cerebrospinal fluid ) .
If you run a hand down your neck to the back , you will feel a hard and bumpy structure. This protects the spinal cord.