185
Central canal
Pia mater
Arachnoid
membrane
Dura
mater
Gray matter
White matter
Spinal nerve roots
Dorsal root ganglion
Subarachnoid
space
Spinal nerve
Skin
Dura mater Superior sagittal sinus
Cerebral cortex
Cerebrum
(white matter)
Arachnoid membrane
Subarachnoid space
Pia mater
A
B
Arachnoid villi
Skull
Figure 8–9. Structure of the meninges. (A) Meninges of the spinal cord. (B) Frontal sec-
tion through the top of the skull showing the double-layered cranial dura mater and one
of the cranial venous sinuses.
QUESTION:Describe the structural difference between the spinal dura mater and the cra-
nial dura mater.
