What do we call the membranes that cover the brain and spinal cord?

The membranes that cover the brain and spinal cord are referred to as the meninges. This term specifically describes the three-layered protective covering surrounding the central nervous system. The meninges consist of the dura mater, arachnoid mater, and pia mater, each providing a distinct level of protection and support to the delicate neural tissues.

Understanding the function of the meninges is essential in health science as they play a critical role in protecting the brain and spinal cord from injury, infection, and providing structural support. They also contain cerebrospinal fluid, which helps to cushion the brain and maintain a stable environment.

The other options do not pertain to the protective coverings of the central nervous system. For instance, the term meniscus refers to the crescent-shaped cartilage in joints, serosa is a type of smooth tissue that lines cavities in the body, and peritoneum is the serous membrane that forms the lining of the abdominal cavity. These terms relate to different anatomical structures and functions unrelated to the meninges.