Which term refers to the three membranes that cover and protect the brain and spinal cord?

• A. Meninges
• B. Arachnoid
• C. Dura mater
• D. Pia mater

Answer: (A)

The term that refers to the three membranes covering and protecting the brain and spinal cord is "meninges." This term encompasses three specific layers: the dura mater, arachnoid mater, and pia mater. Each of these meninges serves a critical function in safeguarding the central nervous system.

The dura mater is the outermost layer, known for its toughness and ability to provide a protective barrier. The arachnoid mater lies underneath the dura mater and is characterized by a web-like structure; it offers a cushioning effect. Finally, the pia mater is the innermost layer that closely adheres to the surface of the brain and spinal cord, supplying it with necessary blood vessels and nutrients.

Understanding the meninges is essential for anyone in the healthcare field, as they play vital roles in protecting neural structures from mechanical injuries and infections, supporting brain function, and maintaining a stable environment for nervous tissue.