Final answer:
The central nervous system is protected by the meninges, which are three layers of membranes. These layers provide physical protection and cushioning for the brain and spinal cord. The three membranes of meninges - dura mater, arachnoid mater, and pia mater - differ in their location and structure.
Step-by-step explanation:
Forms of Protection for the Central Nervous System:
The central nervous system (CNS), which includes the brain and spinal cord, is protected by various mechanisms. Physically, the CNS is surrounded by the meninges, a three-layered membrane system made up of the dura mater, arachnoid mater, and pia mater. These layers provide a physical barrier and cushioning for the brain and spinal cord.
Differences Between the Meninges:
The dura mater is the outermost and toughest layer, providing a strong protective sheath over the CNS. The arachnoid mater is a thin membrane that forms a loose sac around the CNS and contains cerebrospinal fluid. The pia mater is a thin membrane that closely follows the contours of the brain and spinal cord, fitting into grooves and indentations. It is the innermost layer of the meninges.