Chapter 12: Nervous System (meninges)
Pia mater
Meaning soft mother; it is the innermost membrane layer and is applied directly to the surface of the brain and spinal cord
Arachnoid layer
Meaning spiderlike; it is a thin, delicate layer attached to the pia mater by weblike filaments
Dura mater
Meaning tough mother; it forms a tough, fibrous sac around the central nervous system
Arachnoid layer
Middle membrane layer
Dura mater
Most external membrane layer
Pia mater
Most internal membrane layer
Subarachnoid space
Space between the arachnoid layer and the pia mater; it contains cerebrospinal fluid that cushions the brain from the outside
Subarachnoid space
Space between two innermost membrane layers
Subdural space
Space between two outermost membrane layers
meninges
The central nervous system is encased and protected by three membranes known as the ________.
three; connective tissue; brain and spinal cord (central nervous system)
The meninges are [number] layers of [type of tissue] membranes surrounding the [two terms].
Subdural space
Actual space between the dura mater and arachnoid layers
