Question

How is our brain double-protected against injuries and shocks?

Answer 1

The brain is enclosed in a bony box called the cranium and spinal cord is protected by vertebral column. The brain and spinal cord are externally covered by protective covering called meninges. It is made up of three layers namely duramater (outer layer), arachnoid (middle layer), piamater (inner layer). The space between meninges is filled by a watery fluid called cerebro- spinal fluid (CSF). This fluid flows from the brain to spinal cord and then back to brain. It acts as a shock absorber and protects brain form injuries. It also provides nutrients to the cells in brain and spinal cord.