What is the pia mater?
a. Cords of nerve tissue that extend from the conus medullaris
b. Space between the surface of the brain and arachnoid mater
c. Tough fibrous meninx that is the most superficial layer of the meninges
d. Deepest meninx that is attached directly to the surface of the spinal cord
Answer: d. Deepest meninx that is attached directly to the surface of the spinal cord
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